In 2018, researchers examined a random sample of 1455 "disadvantaged" Australian school children (children aged 6 – 15 from rural and outer suburban areas) and found that 4.3% of them were nearsighted. In 2014, the rate of nearsightedness among such children was 3.5%. Is this strong evidence that the parameter has changed since 2018?

Answers

Answer 1

Answer:

No, this is not a strong evidence that the parameter has changed since 2018. This is because, there are so many factors that could have led to the fall in percentage of "disadvantaged school students" from the initial 3.5% to 4.3%.

Some of the factors could be reduction in the number of disadvantaged students, sample size considered being considered as well as the geographic location upon which the random sampling was made.

Step-by-step explanation:


Related Questions

Solve for x.
(x + 13) ft
24 ft

Answers

Answer:

x = 9.

Step-by-step explanation:

If you meant (x + 13) = 24, then we first must subtract 24 by 13.

24 - 13 = 9

Now, check your work by replacing the "x" with 9.

(9+ 13) = 24

24 = 24 <----- This is a true statement.

Therefore, x = 9.

Hope this helps! :D

what’s the slope of the line?

Answers

Answer:

(0,0)

Step-by-step explanation:

1 A high school talent show lasted a total of t minutes. There were 2 intermissions that were each the length of 8 the talent show. Which function can be used to find the number of minutes the talent show lasted, not including intermissions?​

Answers

Answer:

I think f(t)=1/4t

Step-by-step explanation:

Because of you multiply 1/8 times 2, it gives you 1/4. Not 100% sure tho

If total time is t and There were 2 intermissions each the length of 1/ 8  of the talent show then function to find the number of minutes the talent show lasted, not including intermissions  is f(t)= 3t/4 minutes .

What is a function ?

function is a relation from a  set  to another  set provided that each element of first set is related to a unique element of another set .

Here given that total time is t  minutes

And time of intermission is t/8 minutes

And there are total 2 intermissions

Hence function to find the number of minutes the talent show lasted, not including intermissions can be defined as

f(t)= total time - 2(time of intermission)

[tex]f(t) = t- 2\times \frac{t}{8}\\\\f(t)=t-\fract1}{4}\\\\f(t)=\frac{3t}{4}[/tex]

If total time is t and There were 2 intermissions each the length of 1/ 8  of the talent show then function to find the number of minutes the talent show lasted, not including intermissions  is f(t)= 3t/4 minutes .

To learn more about functions visit : https://brainly.com/question/25638609

What is the solution of -8≤-2x≤6

a) -4<x<3
b) -4≤x≤3
c) -4≥x≥3
d) -3≤x≤4​

Answers

Pretty sure the answer is D :)

Charlie can spend up to 10$ on lunch. He wants to buy a turkey sandwich, a bottle of soda,
and x pounds of macaroni. If a turkey sandwich cost $3.75, a bottle of soda cost $2.25, and
macaroni costs $2 per pound, find the range of pounds of macaroni that Charlie can buy.

Answers

Answer:

he can buy 2 pounds of macaroni

Step-by-step explanation:

first you add up the 3.75 and the 2.25 from the turkey and the soda. it ranges to 6 dollars. then if each macaroni pound is 2 you will be able to buy 2 pounds from the 4 dollars you have lefy

Answer:

Charlie can buy 1 or 2 pounds of macaroni

Step-by-step explanation

If we add up the cost of the turkey sandwich and the soda, we get $6.00. Charlie has $10.00 to spend, so when he buys the sandwich and soda, he will have $4.00 left to spend. If the macaroni is $2.00 per pound, then Charlie can buy 1 or 2 pounds of macaroni.

hope this helped

Sal's Sandwich Shop sells wraps and sandwiches as part of its lunch specials. The profit on every sandwich is $2 and the profit on every wrap is $3. Sal made a profit of $1,470 from lunch specials last month. The equation 2x + 3y = 1,470 represents Sal's profits last month, where x is the number of sandwich lunch specials sold and y is the number of wrap lunch specials sold.
Below is a graph that represents the total profits for a third month. Write the equation of the line that represents this graph. Show your work or explain how you determined the equations.

Answers

Answer:

y = -2/3x + 300

Step-by-step explanation:

Since the line is linear, we can find the equation of the line in y=mx+b form.

First, you have to find the slope using the slope formula.  Pick two points from the graph and plug it into the equation.  It doesn't matter which ones; you will get the right answer regardless.  I picked the points (0, 300) and (450, 0).

[tex]m=\frac{y_{2} -y_{1} }{x_{2} -x_{1} }\\m=\frac{300 -0 }{0 -450 }\\m=\frac{300}{-450} \\m=-\frac{2}{3}[/tex]

You now have slope (m).  You have to find the y-intercept (b) next.  The y-intercept is the point where the line crosses the y-axis.  For this graph, the line crosses the y-axis at (0, 300), making the y-intercept 300.

Since you have m and b, you can plug the values into y=mx+b.

y = mx + b

y = -2/3x + 300

I want to know what is the formula for an endpoint with the midpoint of a line segement.

Answers

Answer:

Did u actually need the answer or is this another c.hat?

Step-by-step explanation:

Games Galore Super Store buys the latest video game at a wholesale price of $30.00. The markup rate at Game's Galore Super Store is 40%. You use your allowance to purchase the game at the store. How much will you pay, not including tax and explain your reasoning. *

Answers

Answer:

$42

Step-by-step explanation:

By definition, Markup is the difference between a product's selling price and cost as a percentage of the cost.

For example, if a product sells for $125 and costs $100, the additional price increase is ($125 – $100) / $100) x 100 = 25%.

Given data

firstly let us solve for 40% of $30

=40/100*30

=0.4*30

=$12

therefore the sale price will be the markup rate plus the initial price

Hence the you will have to pay 12+30=$42

Given the function, f(x)= 1/2x − 4, evaluate f(2).

Answers

Answer:

-3

Step-by-step explanation:

1/2x2=1  1-4=-3

Pls help, my moms gonna tell if i fail

Answers

Answer:

0 and 3, I think those are the answers cause they make the most sense

Step-by-step explanation:

solve the system of equations
y=-2/3x+1 and x+y=4

Answers

Answer:

Point form: (9,-5)

Step-by-step explanation:

y=-2/3x+1 and x+y=4

Point form: (9,-5)

Equation form: x = 9, y = -5

rewrite the expression below in exponential form
log2 ^0.125=-3

Answers

Answer: 2^-3 = 0.125

Step-by-step explanation:

Just took a test over it :)

Cindy has a picture that is 3 inches wide and 4 inches long. She wants to enlarge it so that it is 12 inches long. How wide will the picture be?

Answers

Answer:

9 inches wide

Step-by-step explanation:

What we know:

Cindy has a 3-inch by 4-inch picture.

She wants to enlarge that picture so the length is 12 inches.

It's 4 inches long in the original, and 12 inches in the scale.

Divide 12 by 4 to get a scale factor of 3.

Multiply 3 by 3 (essentially 3^2) to get 9 inches as the width.

Brainlest if correct

Answers

I believe that the answer is B

Manny makes dinner using 1 box of pasta and 1 jar of sauce. If pasta is sold in packages of 10 boxes and sauce is sold in packages of 2 jars, what is the least number of dinners that Manny can make without any supplies leftover?

Answers

Answer:

10 dinners

Step-by-step explanation:

We solve using the Least Common Multiple Method.

We are told:

Pasta is sold in packages of 10 boxes Sauce is sold in packages of 2 jars.

We find the Multiples of 2 and 10

Multiples of 2:

2, 4, 6, 8, 10, 12, 14

Multiples of 10:

10, 20, 30

Therefore,

LCM(2, 10) = 10

The least number of dinners that Manny can make without any supplies leftover is 10 dinners

Can someone solve these by elimination?

Answers

Answer:

x=1 and y=2 for number 4

Step-by-step explanation:

what is the area if b=16mm and h=12mm

Answers

Answer: 96

Step-by-step explanation: the formula for area of a triangle is 1/2 (b)(h)

so 1/2 (16)(12)

= 96

Your social security number?
A) continuous
B) discrete
C)categorical

Answers

B is the correct answer

Estimate and then solve 8,784 ÷ 61 = ___. answers: 133 134 143 144 I WILL MARK U BRAINLEIST IF ITS RIGHT​

Answers

Answer:

The answer is 144

Step-by-step explanation:

Answer:

Ummm...

8,784/61=

144, D ??

I’ll mark you brainlist I’ll mark you brainlist

Answers

Answer:

-2

Step-by-step explanation:

:)

-2 , i believe it would be -2

Evolution requires at molecules and atoms
assemble themselves into what order​

Answers

Answer:

Evolution requires at molecules and atoms assemble themselves into increasing order

If two lines are perpendicular, what must be true about the slopes of the two lines. Select all that apply.

.

slopes are the same

Slopes are reciprocals

Slope are whole values

Slopes are opposites (one positive and one negative)

Answers

Answer:

Concept: Linear Systems

Those that are parallel have equal slope, contrary those that are parallel have reciprocal. Hope this helps!

Solve for X, please help me.

Answers

Answer:

9+12=21

21+2=33

23+3=26

Step-by-step explanation:

the answer is 7

determine the equation of the line

Answers

Answer:

y=5x-12

Step-by-step explanation:

the slope is 5 and y int. is -12

2. The angle of elevation of the top of a vertical
cliff, as seen from a boat 120 m away, is 32°.
The angle of elevation of the top of a flagpole
at the edge of the cliff, as seen from the boat,
is 37º. Find the height of the flagpole.

Answers

Answer: 15.44 m

Step-by-step explanation:

We can think this as two triangle rectangles.

In both cases, the adjacent cathetus is 120m.

When the angle is 32°, the opposite cathetus will be the height of the cliff.

When the angle is 37°, the opposite cathetus will be the heigth of the cliff plus the height of the flagpole.

Then we need to compute both of them and calculate the difference.

We can use the trigonometric relation:

Tan(θ) = (opposite cathetus)/(adjacent cathetus)

in this case we have:

Tan(32°) = (height of the cliff)/(120m)

Tan(32°)*120m = height of the cliff = 74.98m

Now we can use the other angle to compute:

Tan(37°) = (heigth of the cliff + heigth of the flagpole)/120m

Tan(37°)*120m = heigth of the cliff + heigth of the flagpole = 90.42m

Then the height of the flagpole will be:

H = 90.42m - 74.98m = 15.44 m

laura has 160 pounds of green beans at her vegetable stand. she sells 10 pounds of green beans every hour, what is the percent decrease in green beans after 3 hours?

Answers

Answer:

laura has 160 pounds of green beans at her vegetable stand. she sells 10 pounds of green beans every hour, what is the percent decrease in green beans after 3 hours?Step-by-step explanation:

Answer:

g

Step-by-step explanation:

Use the equation p=b-3 to find the value of p when b = 8

Answers

Answer:

5

Step-by-step explanation:

p=(8)-3

p=5

Answer:

p=8-3

p=5

Step-by-step explanation:

5/8 divided by 1 1/3? In fraction form

Answers

Answer:

15/32

Step-by-step explanation:

15/32 is the fraction form of the statement 5/8 divided by 1 1/3.

To divide 5/8 by 1 1/3, we first need to convert the mixed number 1 1/3 to an improper fraction.

1 1/3 can be written as (3/3 + 1/3), which simplifies to 4/3.

Now, we can rewrite the division as the multiplication of the dividend by the reciprocal of the divisor:

(5/8) * (3/4)

Multiplying the numerators and denominators:

(5 * 3) / (8 * 4) = 15/32

Therefore, 5/8 divided by 1 1/3 in fraction form is equal to 15/32.

Learn more about ratios here:

https://brainly.com/question/13419413

#SPJ6

Which of the following quadrilaterals are similar?

Answers

Answer:

I believe its the last one

Answer:

the last one.

Step-by-step explanation:

y = 4x 2 is shifted 5 units to the right

Answers

Answer:4

Step-by-step explanation: y=mx+b is the slope intercept form of an equation. m is the slope and b is the y-intercept. just substitute 4 for m and 2 for b and get the original equation y = 4x + 2. since 4 is m, then 4 is the slope.

Answer:

y= 4(x-5) 2

Step-by-step explanation:

It seems counterintuitive, but to shift a parabola, you have to subtract five from x. To shift to the left, you would simply add five to x instead of subtract.

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