Someone please please help me on this problem

The answers are =

a) left-skewed

b) Standard Error ≈ 3.146

c) the probability is approximately 0.7867.

d) standard deviation of = 94.094.

e) the probability is approximately 0.8669.

(a) The distribution of students' grades is left-skewed.

(b) If n = 30 students are selected at random, the distribution of the sample mean grade is approximately normal with a mean of 68 and a standard deviation of 3.146.

To calculate the standard deviation of the sample mean, also known as the standard error, you divide the population standard deviation by the square root of the sample size:

Standard Error = σ / √n = 17.2 / √30 ≈ 3.146

(c) To find the probability that the sample mean grade for these 30 students is less than 72.0, we can use the z-score formula and the standard error calculated above:

z = (x - μ) / (σ / √n)

z = (72 - 68) / (17.2 / √30) ≈ 0.7952

Now, we can use a standard normal distribution table or a calculator to find the probability corresponding to this z-score.

From the table or calculator, the probability is approximately 0.7867.

(d) If n = 30 students are selected at random, the distribution of the sample total grade is approximately normal with a mean of 30 × 68 = 2040 and a standard deviation of √(30) × 17.2 = 94.094.

The mean of the sample total grade is the product of the population mean and the sample size (n).

The standard deviation of the sample total grade is the product of the population standard deviation and the square root of the sample size (n).

(e) To find the probability that the total grade for these 30 students is less than 2160.0, we can use the z-score formula and the standard deviation calculated above:

z = (x - μ) / (σ × √n)

z = (2160 - 2040) / (17.2 × √30) ≈ 1.105

Using the standard normal distribution table or a calculator, the probability corresponding to this z-score is approximately 0.8669.

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No, I haven't heard about the pug that built himself a home. Could you please provide more information or context about the puzzle in Algebra 1 Student Journal 5.2? I'll do my best to assist you with it.

Did you hear about the pug that built himself a home?" is more of a riddle or a joke rather than a puzzle from an Algebra 1 Student Journal. It doesn't appear to be directly related to an algebraic problem or concept.

If you have any specific algebraic problems or questions from the Algebra 1 Student Journal, please let me know, and I'll be happy to assist you with them.

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The sum of the series Σ(n = 1 to 4) n is 10.

We have,

The concept used to find the sum of the series Σ(n=1 to 4) n is called summation or addition.

In mathematics, summation is a way to express the total of a series of numbers.

The notation Σ (capital sigma) is used to represent summation.

It is followed by the index variable (in this case, n) which indicates the values being summed, and the range or condition under which the summation is performed (in this case, n=1 to 4).

The series Σ(n=1 to 4) n represents the sum of the numbers from 1 to 4.

The notation Σ (capital sigma) denotes the sum and the expression

(n = 1 to 4) indicates the range of values over which the sum is taken.

To find the sum, we add up all the numbers in the given range.

In this case, we have:

1 + 2 + 3 + 4 = 10.

Thus,

The sum of the series Σ(n = 1 to 4) n is 10.

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For the vector field f = 2x², −3y², z², Divergence (∇·f) = 4x - 6y² + 2z, Curl (∇×f) = (0, 0, 0).

To compute the divergence (∇·f) and the curl (∇×f) of the vector field f = (2x², -3y², z²), we can use the vector calculus operators. Divergence (∇·f),

In this case, the divergence of f is the partial derivative of each part of the field, for f = (2x², -3y², z²), we have,

∂f₁/∂x = 4x

∂f₂/∂y = ∂(-3y²)/∂y = -6y²

∂f₃/∂z  = 2z

Therefore, the divergence of f is,

∇·f = 4x - 6y² + 2z

Curl (∇×f),

The curl of a vector field f = (f₁, f₂, f₃) is given by the cross product of the curl operator (∇×) and the vector field. In this case, the curl of f is,

∇×f  = (i∂/∂x + j∂/∂y + k∂/∂y) x (i2x², -j3y², kz²)

Basically we can write  (i2x², -j3y², kz²) as (f₁, f₂, f₃)

we have,

∂f₁/∂z = 0

∂f₂/∂x = ∂(-3y²)/∂x = 0

∂f₃/∂y = ∂(z²)/∂y = 0

Therefore, the curl of f is,

∇×f = (0, 0, 0)

In this case, the curl of f is the zero vector, indicating that the vector field f is irrotational.

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Complete question - compute the divergence ∇·f and the curl∇✕f of the vector field. f = 2x², −3y², z².

The radius of the circle can be found by dividing the circumference by 2π. In this case, the radius is 32.

The formula for the circumference of a circle is given by C = 2πr, where C is the circumference and r is the radius. We are given that the circumference is 64π.

To find the radius, we can rearrange the formula as r = C / (2π). Substituting the given value of the circumference, we have r = 64π / (2π) = 32.

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If the estimate being tested is less than the benchmark, you should conduct a left tail one-sample hypothesis test. So, correct option is C.

In hypothesis testing, the null hypothesis typically assumes that there is no significant difference or effect, and the alternative hypothesis proposes that there is a significant difference or effect.

In this case, since the estimate is less than the benchmark, the alternative hypothesis would state that there is a significant difference, and we are specifically interested in detecting a decrease or a lower value.

Therefore, we conduct a left tail test to evaluate the evidence against the null hypothesis and determine if the estimate is significantly lower than the benchmark.

A left tail test focuses on the leftmost portion of the distribution and calculates the probability of observing a value as extreme or more extreme than the estimate, assuming the null hypothesis is true.

By comparing the test statistic with the critical value or p-value associated with the chosen significance level, we can make conclusions about the statistical significance of the estimate being less than the benchmark.

So, correct option is C.

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Step-by-step explanation:

both are equal

pls Mark brainliest

Answer: 10 miles

Step-by-step explanation:

Practically, just look at it.  30 minutes = 5 miles, 60 minutes = 10 miles

Mathmatically, find the constant of proportionality.

Answer:

For game ideas, try to make a game that everyone will want to play. Make it fun, challenging, but still beatable, but not too easy. One thing you could do is a trivia game! With lots of different subjects so people can choose what they get questions about. Also, do a lot of research to get the questions! Hope this helped :)

Step-by-step explanation:

Answer:

KING OF QUESTIONS!!!

Step-by-step explanation:

Each player starts out with 10 tokens ( tokens can be anything I recommend spare change or coins. ) the tokens will be used as point tallies at the end of the game.  But to determine who goes first the question master asks a question from the starting deck( The easiest questions) and starting with player one the players answer and whoever answers with the correct answer will go first, the other players will form an orderly line from closest to the correct answer to farthest. ( If there are more than 1 successful answers you pull another card from the next deck. This is an increase in difficulty. And it will keep increasing until there is one person with the correct or closest answer or until they reach the end of the final deck. Remember that this event is highly unlikely) After this is done the game begins.  The question master asks a question the players will answer. The players that get it correct will receive 2 token. The players that do not but are close get 1 and the player to get the farthest from the correct answer loses 1 token. ( Tokens are worth 1 point.)

Roles:

Player 1 ( Answers the questions.)

Player 2 ( Answers the questions.)

Player 3 ( Answers the questions.)

Player 4 ( Answers the questions.)

Question Master & Token Master ( Asks the questions and gives the token to the correct answer. )

How to Win:

Quick Match- Play until a player reaches 30 tokens.

Long Match- Play until all but one player is eliminated.

Ways to Lose-  If a player loses all of there tokens or is cheating they are eliminated, this happens only when the player is caught cheating or stealing tokens from other players or when the player loses all of these tokens due to incorrect answers.

Answer:

y = 1.50x + 4 ;

Step-by-step explanation:

Given that bike rental cost $4 plus $1.50 per hour

From the information given, the change in y per unit change in x is the value of the slope ;

Therefore, Given that total cost = y and x) number of hours

Change in cost per change in number of hours) 1.50 = slope ; intercept = constant = $4

The equation, in slope intercept form :

y = mx + c

y = 1.50x + 4

Answer:

the actual answer is 3,240 is the answer

a/ To find the limit of the expression 2 + 4 + 3i Re(z - i), we need to replace z with the limit point. Therefore, the expression will be:2 + 4 + 3i Re(z - i) = 6 + 3i Re(z - i)

We have to find the limit as z approaches i. Consider the following:

Since Re(z - i) is a real number, the limit can be found by setting Re(z - i) = 0.

Therefore, lim 2+4+3i Re(z - i) = lim 6 + 3i Re(z - i) = 6.Explanation:

b/ Given the limit lim zi / zi, we can simplify the expression by canceling zi in the numerator and the denominator. Therefore, lim zi / zi = lim 1 = 1.

Explanation:

4. Let f(x) = x3 + iy(a) The derivative of f(x) is the function f′(x). To find the derivative of f(x), we need to differentiate the real and imaginary components of f(x) separately.

Therefore, f′(x) = 3x² + iy, since the derivative of i is zero.

Explanation: (b) We must test the Cauchy-Riemann equations to see if f(x) is analytic. f(x) is said to be analytic if it meets the Cauchy-Riemann conditions. Therefore, we need to verify that the following equations are satisfied: ∂u / ∂x = ∂v / ∂y and ∂u / ∂y = -∂v / ∂x. Using the function given above, we can easily obtain its real and imaginary components. u(x, y) = x³ and v(x, y) = y. Therefore, ∂u / ∂x = 3x² and ∂v / ∂y = 1, but 3x² ≠ 1

Therefore, the Cauchy-Riemann equations are not satisfied, so f(x) is not analytic.

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The number you are is 2.

Let's break down the information provided:

You are a factor of 40 when paired with 15.

Your least common multiple (LCM) with 15 is not equal to 1.

To find the number that satisfies these conditions, let's examine the factors of 40. The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40. Now, we need to find a number from this list that is a factor of 40 when paired with 15.

To find the LCM of 15 and each factor of 40, we can compare their multiples:

For 15 and 1: LCM = 15

For 15 and 2: LCM = 30

For 15 and 4: LCM = 60

For 15 and 5: LCM = 15 (already the smaller number)

For 15 and 8: LCM = 120

For 15 and 10: LCM = 30 (already the smaller number)

For 15 and 20: LCM = 60 (already the smaller number)

For 15 and 40: LCM = 120 (already the smaller number)

From the list, we can see that the LCM of 15 with 5, 10, 20, and 40 is equal to 15. However, the problem states that the LCM of 15 with the number is not equal to 1. Thus, the number that satisfies both conditions is 2, as the LCM of 15 and 2 is 30, and it is not equal to 1. Therefore, the number you are is 2.

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Answer:

x=-1

Step-by-step explanation:

Hello there!

The information we are given:

We are told that the distance from point a to c is x + 10

We are told that the distance from a to b is 5

we are also told that the distance from b to c is 2x+6

Because from point A to B and B to C is inside the total of A to C we can add the two together and create a equation to solve for x

so the sum of the two parts 5 + 2x + 6

*combine like terms*

11 + 2x

is equal to the total distance (x+10)

now we solve for x

11 + 2x = x + 10

step 1 subtract x from each side by

2x - x =  x

x -x cancels out

now we have 11 + x = 10

step 2 subtract 11 from each side

11-11 cancels out

10 - 11 = -1

we're left with x = -1

Now lets plug in x and see if A to C is equal to A to B + B to C

(-1) + 10 = 5 + 2(-1) + 6

10 - 1= 9

2*-1=-2

6-2=4

4+5=9

9=9

which is true so we can conclude that x = -1

a. The null hypothesis is H₀: μ = 14 and alternative hypothesis is Ha: μ ≠ 14

b. The t-test for the data is 1.11

c. The p-value for the t-test is 0.28

d. We accept the null hypothesis since the p-value is greater than the significance value.

e. The decision to fail to reject the null hypothesis means that we do not have enough evidence to support the claim

(a) The claim is that the mean time it takes smokers to quit smoking permanently is 14 years.

Null hypothesis (H₀): The mean time it takes smokers to quit smoking permanently is 14 years.

H₀: μ = 14

Alternative hypothesis (Ha): The mean time it takes smokers to quit smoking permanently is not 14 years.

Ha: μ ≠ 14

(b) To identify the standardized test statistic, we can use the formula:

t = (x - μ) / (s / √n)

where:

x is the sample mean,

μ is the population mean,

s is the population standard deviation,

n is the sample size.

Given:

Sample mean (x) = 15.29375 (rounded to 5 decimal places)

Population mean (μ) = 14

Population standard deviation (s) = 6.6

Sample size (n) = 32

Using these values, we can calculate the standardized test statistic.

t = (15.29375 - 14) / (6.6 / √32)

t = 1.11

(c) To find the p-value, we need to use the t-distribution table or statistical software. Since using technology is mentioned in the question, we will use it to calculate the p-value.

The p-value for a two-tailed test is approximately 0.28.

(d) We compare the p-value to the significance level α = 0.09.

Since the p-value 0.28 is greater than the significance level (0.09), we fail to reject the null hypothesis.

(e) The decision to fail to reject the null hypothesis means that we do not have enough evidence to support the claim that the mean time it takes smokers to quit smoking permanently is different from 14 years at the 10% level of significance.

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the quadratic formula work all the time because it is suitable for every equation.

The first property states that the Fourier transform of a function evaluated at a certain frequency is equal to 2π times the inverse Fourier transform of the function evaluated at the negative of that frequency.

The second property states that the Fourier transform of a modulated function is equal to the Fourier transform of the original function shifted by the modulation frequency.

To verify the given properties of the Fourier transform, we can use the definitions and properties of the Fourier transform. Here's how we can verify each property:

1. Property: (Fu)(ω) = 2π (F^-1u)(-ω)

To verify this property, we need to use the definitions of the Fourier transform and its inverse. Let's denote the Fourier transform operator as F and its inverse as F^-1.

According to the definition of the Fourier transform, for a function u(t), its Fourier transform is given by:

(Fu)(ω) = ∫[from -∞ to ∞] u(t) e^(-iωt) dt

Similarly, the inverse Fourier transform of a function U(ω) is given by:

(F^-1U)(t) = (1/2π) ∫[from -∞ to ∞] U(ω) e^(iωt) dω

Now, let's substitute -ω for ω in the inverse Fourier transform:

(F^-1u)(-ω) = (1/2π) ∫[from -∞ to ∞] u(t) e^(i(-ω)t) dt

= (1/2π) ∫[from -∞ to ∞] u(t) e^(iωt) dt

Comparing this with the Fourier transform, we see that (F^-1u)(-ω) is equal to (Fu)(ω) multiplied by 2π, which verifies the first property.

2. Property: (F(e^(iat)u))(ω) = (Fu)(ω + a)

To verify this property, we use the modulation property of the Fourier transform. According to this property, if u(t) has a Fourier transform U(ω), then the Fourier transform of e^(iat)u(t) is given by:

(F(e^(iat)u))(ω) = (Fu)(ω + a)

Applying this property to the given expression, we have:

(F(e^(iat)u))(ω) = (Fu)(ω + a)

This verifies the second property.

In summary, we have verified both properties of the Fourier transform as stated.

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Answer:

Consider this option:

1. the equation of given line is y=-x-3 (it is easy to find it using points (0;-3)&(-3;0)).

2. according to the equation of line: y≥-x-3

Answer:

120 degrees

Step-by-step explanation:

im a god cuz happppy

Answer:

120 lol

Step-by-step explanation:

Answer:

3.84 feets

Step-by-step explanation:

Given that:

θ = 88°

Radius, r = 2.5

The length of section of the wire, L ; Length of an arc

L = θ / 360° * 2πr

L = 88/360 * 2*π*2.5

L = (88/360) * 15.707963

L = 3.8397

Length of section of wire = 3.84 feets

Answer:

I’m sorry, but it’s a black screen.

Step-by-step explanation:

Answer:

135

Step-by-step explanation:

Hello There!

The angle that has a measure of 45° and x are supplementary angles meaning that the sum of the two angles is 180

so x can be found by subtracting the given angle (45 in this case) from 180

180 - 45 = 135

so x = 135

Answer:

135

Step-by-step explanation:

When there's a completely straight line the angle is 180 and when u have a angle already there you subtract 180 from the angle in this case 180-45=135

Answer: 3√6-6/6 + √2=a-b√6

Step-by-step explanation: multiply radicals in the denominator by conjugate to get (a+b)(a-b)=a^2-B^2 pattern.

Answer:

The answer is "True".

Step-by-step explanation:

The z-score value shows how often standard deviations were away from the earth. If it is 0, it is on average. The positive Z sign indicates that perhaps the raw mark is greater than the average. While z-score is equivalent to +1, for example, it is a standard deviation of 1 above average. This can be used for implementing series and also for comparing the trend of mortality among various individuals or between various periods and by using the z score we find the curve length, that's why it is correct.

Answer:

(x, y) -- [X-4, Y+6]

Answer:

p = 8h

A very short answer, I know, but reading this out loud reads "Manuel's pay is equal to 8 dollars an hour."

Answer:

p=8h

Step-by-step explanation:

because he gets paid 8 dollars ever hour he works so if you multiple the hours he works to 8 dollars you get his total pay