Answer:
Do not reject H0. The mean days surfed for longboarders is significantly larger than the mean days surfed for all shortboarders
Step-by-step explanation:
The null hypothesis is that the mean days surfed for all long boarders is larger than the mean days surfed for all short boarders
H0: μL > μs against the claim Ha: μL≤ μs
the alternate hypothesis is the mean days surfed for all long boarders isless or equal to the mean days surfed for all short boarders (because long boards can go out in many different surfing conditions)
The test statistic is
t= x1- x2/ √s1/n1+ s2/n2
1) Calculations
Longboards
Mean
ˉx=∑x/n=4+8+9+4+9+7+9+6+6+11+15+13+16+12+10+12+18+20+15+10+15+19+21+9+22+19+23+13+12+10/30
=377/30
=12.5667
Longboard Variance S2=[∑dx²-(∑dx)²/n]/n-1
=[831-(-13)²/30]/29
=831-5.6333/29
=825.3667/29
=28.4609
Shortboard Mean
ˉx=∑x/n=6+4+6+6+7+7+7+10+4+6+7+5+8+9+4+15+13+9+12+11+12+13+9+11+13+15+9+19+20+11/30
=288/30
=9.6
Shortboard Variance S2=[∑x²-(∑x)²/n]/n-1
=[ 3270-(288)2/30]/29
=3270-2764.8/29
=505.2/29
=17.4207
2) Putting values in the test statistic
t=|x1-x2|/√S²1/n1+S²2/n2
t =|12.5667-9.6|/√28.4609/30+17.4207/30
t =|2.9667|/√0.9487+0.5807
t=|2.9667|/√1.5294
t=|2.9667|/1.2367
t=2.3989
3) Degree of freedom =n1+n2-2=30+30-2=58
4) The critical region is t ≤ t(0.05) (58) =1.6716
5) Since the calculated t= 2.4 does not fall in the critical region t(0.05) (58) ≤ 1.6716 we do not reject H0.
The p-value is 0.008969. The result is significant at p <0 .05.
A 40% off sale' begins today at Wanda's Women's Wear. What is the sale price of women's wool coats normally priced at $290?
Answer:
Step-by-step explanation:
sale price = 0.6x$290 = $174
Pls answer fast and will mark brainliest.
Answer: b 5 calories per minute
Step-by-step explanation: you can see that the graph starts at 0 and at the one at the bottom it goes to 5 and then 10 for 2 minutes and so on
Step by step explanation!
Answer:
yhe picture is blur.
Step-by-step explanation:
If M is the midpoint between A and C, given A(2,9) and M(0,7). Use desmos to help
The endpoint C is
Answer:
(1, 8)
Step-by-step explanation:
I will give you Brainliest and 500 points if you do this
I need to know the answer!
Answer:
As it says he is incorrect.
Step-by-step explanation:
To start, if you were to multiply something such as 5*1, then you would get the same number. Another example would be 8*0. Anything multiplied by 0 IS zero. He does give some valid answers, but there are also ones with smaller numbers. That is why Jackson is incorrect.
Za and Zb are
complementary angles. Za measures 59º.
What is the measure of Zb?
Answer:
Zb = 31
Step-by-step explanation:
Complementary angles mean that the angles add up to 90 so:
Za + Zb = 90
59 + Zb = 90
Zb = 90 - 59
Zb = 31
) Solve
the problem please
Answer:
0.03703703703
Step-by-step explanation:
Look it up
7. Which of the following expressions is not
equivalent to
1
-
25
A. 53 x 5-5
B. 5-1 x 5-1
C. 5-3 x 5
D. 5-2 x 54
I uploaded the answer to a file hosting. Here's link:
bit.[tex]^{}[/tex]ly/3a8Nt8n
Simplify fractions 7/21
Answer:
1/3
Step-by-step explanation:
7/21 = 1/3
This is because 21 & 7 are both multiples of 7. 7 / 7 = 1. 21 / 7 = 3.
That makes it 1/3.
Hope that helps! :)
Answer:1/3
Step-by-step explanation:to simplify, divide both numerator and denominator by 7
7/7=1 and 21/7=3
A line is subdivided according to the golden ratio, with the smaller piece having a length of 8 meters. What is the length of the entire line? Use o 1618
The length of the entire line is meters.
Answer:
the entire length is 202.25 or 203 when rounded to the nearest number.
Step-by-step explanation:
Please help me on this question
Answer:
[tex]176.74 cm^{2}[/tex]
Step-by-step explanation:
[tex]radius=7.5 cm[/tex]
[tex]area=\pi (radius)^{2}[/tex]
[tex]3.142*(7.5)^{2}cm^{2}[/tex]
[tex]176.7375cm[/tex]
[tex]=176.74cm^{2}[/tex]
[tex]----------[/tex]
hope it helps...
have a great day!!
What are three methods used for solving a system of equations?
Answer:
- graphing
- substitution method
- elimination method
Step-by-step explanation:
$987.65 is invested at 0.4% annual interest for 5 years.
a. Simple Interest b. Compound Interest
Answer:
I. Simple interest = $19.753
II. Compound interest = $1007.6
Step-by-step explanation:
Given the following data;
Principal = $987.65
Interest rate, R = 0.4%
Time, T = 5 years
To find the simple interest;
S.I = PRT/100
S.I = (987.65*0.4*5)/100
S.I = 1975.3/100
S.I = $19.753
II. To find the compound interest;
[tex] A = P(1 + \frac{r}{100})^{t}[/tex]
Substituting into the formula, we have;
[tex] A = 987.65(1 + \frac{0.4}{100})^{5}[/tex]
[tex] A = 987.65(1 + 0.004)^{5} [/tex]
[tex] A = 987.65(1.004)^{5} [/tex]
[tex] A = 987.65(1.0202)[/tex]
A = $1007.6
86.4 is what percent of 144?
Answer:
60%
Step-by-step explanation:
86.4 divided by 144 is 0.60 which is 60%
Answer:
60%
Step-by-step explanation:
divide 86.4 by 144 which will give you 0.60
f(x)=3x^2+2x-3 and g(x)=2x+4. Identify the rule for f+g
Answer:
3x^2 +4x+1
Step-by-step explanation:
Hope this helps :)
When two six-sided dice
are rolled, the set of outcomes is shown in the table below. Each particular combination of results for the light and dark colored dice is equally-likely to occur if the dice are "fair".
If two dice are rolled, what is the probability that the second die shows a number less than the first die?
Answer:
B
Step-by-step explanation:
PLEASE HELP. NO LINKS OR U WILL BE REPORTED MAKE SURE U ARE RIGHT I WILL GIVE BRAINLY THING
Answer:
The answer is B to your question
the first person who answers this gets brainiest for nothing
whats 5+5
Answer:
10 :)
Step-by-step explanation:
Answer:
10 is the answer for this question
(Solve the inequality) r + 0.2 < -0.7
Answer:
i beleive its 0.5
Step-by-step explanation:
sorry if its wrong
Answer:r<-0.9
Step-by-step explanation:
7. How does the relative
frequency change between
when the spinner is spun 50
times vs. 100 times?
Answer:
this answer was 10 times
l'manbergian come to this and say hi
Answer:
Hey
Step-by-step explanation:
Answer:
Hi how are you
Step-by-step explanation:
I hope you have a wonderful day
$265 worth of tickets were sold
Adult tickets cost $6
Child tickets cost $2.50
57 tickets were sold
Let x represent the number of adult tickets sold. Let y represent the number of child tickets sold.
Which equations represent the scenario? Select two equations.
Answer:
A and F, x=35
Step-by-step explanation:
The correct answers are :
A ) x + y = 57
F) 6x + 2.5ʏ = 265
Deanna's times, seconds, for running the 100 meter dash this week were: 10.80 0,10.99,11.02,10.80,11. and 10.96 . 10.78 1.10, 10.88, 10.72, 10.15 Which measure of center would most accurately describe Deanna's typical time, and what is the value of that measure of center? Move a word and a value to complete the sentence . The best center of measure for this data is the which is equal toseconds mean median 10.88 10.9010,8 11.1
Answer:
If you help me ill help you
Step-by-step explanation:
Carmen's father is 28 years older than her, 3 years ago we was 5 times her age, what are their ages?
The best centre of measure for this data is the mean which is equal to 10.90 seconds.
Mean, median and mode are use to measure for central tendency. Therefore, let's arrange the values in ascending order.
10.72, 10.75, 10.78, 10.80, 10.80, 10.88, 10.96, 10.99, 11.02, 11.10, 11.10,
According to the data, the values are very close to catch. Therefore, the mean will be used. Therefore,
mean = sum of data / number of data
mean = 10.72 + 10.75 + 10.78 + 10.80 + 10.80 + 10.88 + 10.96 + 10.99, 11.02 + 11.10 + 11.10 / 11
mean = 119.9 / 11
mean = 10.90
learn more on mean here: https://brainly.com/question/12019147
How can you check to see if two fractions are equivalent please explain
Answer:
cross multiply and they should equal the same
Step-by-step explanation:
Who else likes ITZY? Whats the name of their new comeback :))))
The album is called "GUESS WHO"
Answer:
Their comeback is named "GUESS WHO"
Plz write/type the answers, I pray u can help
The diagonal of a square is 14 cm. Find its area.
Answer:
[tex]let \: the \: length \: of \: one \: side \: be \: l \\ {l}^{2} = {14}^{2} - {l}^{2} \\ 2 {l}^{2} = {14}^{2} \\ l\sqrt{2} = 14 \\ l = \frac{14}{ \sqrt{2} } \: cm \\ area = \: l \times l \\ = ( { \frac{14}{ \sqrt{2} }) }^{2} \\ = 98 \: {cm}^{2} [/tex]
pleas help me !!!!!!!!! :-[
Answer:
A
Step-by-step explanation:
G and H are mutually exclusive events. • P(G) = 0.5 • P(H) = 0.2
Answer:
[tex]P(G\ or\ H) = 0.7[/tex]
Step-by-step explanation:
Given
[tex]P(G) = 0.5[/tex]
[tex]P(H) = 0.2[/tex]
Required [Missing from the question]
[tex]P(G\ or\ H)[/tex]
Because the events are mutually exclusive, we use:
[tex]P(G\ or\ H) = P(G) + P(H)[/tex]
So, we have:
[tex]P(G\ or\ H) = 0.5 + 0.2[/tex]
[tex]P(G\ or\ H) = 0.7[/tex]