1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
pav-90 [236]
2 years ago
10

The0 coach recoreded how fast his runners ran...

Mathematics
1 answer:
Naddika [18.5K]2 years ago
8 0

Answer:

You didn't fully ask the question

Step-by-step explanation:

You might be interested in
The mean annual premium for automobile insurance in the United States is $1503 (Insure website, March 6, 2014). Being from Penns
romanna [79]

Answer:

If we compare the p value and the significance level for example \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can conclude that the mean annual premium in Pennsylvania is significantly lower than the national mean annual premium of 1503 at 5% of significance.

Step-by-step explanation:

1) Data given and notation  

\bar X=1440 represent the mean annual premium value for the sample  

s=165 represent the sample standard deviation for the sample  

n=25 sample size  

\mu_o =1503 represent the value that we want to test

\alpha represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean annual premium in Pennsylvania is lower than the national mean annual premium, the system of hypothesis would be:  

Null hypothesis:\mu \geq 1503  

Alternative hypothesis:\mu < 1503  

If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic

We can replace in formula (1) the info given like this:  

t=\frac{1440-1503}{\frac{165}{\sqrt{25}}}=-1.909    

P-value

The first step is calculate the degrees of freedom, on this case:  

df=n-1=25-1=24  

Since is a one side left tailed test the p value would be:  

p_v =P(t_{(24)}  

Conclusion  

If we compare the p value and the significance level for example \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can conclude that the mean annual premium in Pennsylvania is significantly lower than the national mean annual premium of 1503 at 5% of significance.  

7 0
3 years ago
A rectangular picture is 2.5 inches wide and 4 inches long. If the picture is enlarged so that it is 10 inches long, what is the
Andrej [43]
10/2.5=4 So, we should multiply it by 4
4x4=16 width
Pls select brainlest
6 0
3 years ago
A neighborhood swimming pool is the shape of a rectangular prism the pool measures 30 feet in length and 18 feet in width and ha
lesya [120]

Answer:

15,120 gallons of water

Step-by-step explanation:

to find the volume, your equation is

v=length * width * height

v=30*18*4=2160 feet cubed

2160*7=15120

6 0
2 years ago
Help please! Thanks
SSSSS [86.1K]

Answer:

E. 0

Step-by-step explanation:

There isn't any guarantee that there are <em>any </em>people that have their birthdays in the same month based on what you're given, so your answer would be 0.

8 0
3 years ago
Can you break down how this equation was solved?
dolphi86 [110]
Yes! Let me help you!

Here is the original equation, lets solve this step-by-step

(x + 2)/4 = 5

Now, lets find out how. 

We must apply the inverse operation. 

4/2 is the reciprocal, so lets multiply that to both sides. 

4/2 = 2
5*4 = 20

4x + 8 = 20
      -8      -8            Subtract 8 from both sides. (Inverse operation) 

4x = 12
4x/4  = 12/4             Divide 4 by both sides (Inverse)

x = 12/4
x = 3           Simplified

Answer:  x = 3
3 0
3 years ago
Read 2 more answers
Other questions:
  • The expression c+0.07c gives the cost of an item including the tax of 7%. Simplify the expression.
    14·1 answer
  • 10 less than 222 is_.
    14·2 answers
  • 9e + 4 = -5e + 14 + 13e =
    12·1 answer
  • 787.4÷127 show the work
    8·2 answers
  • Suppose you have $11,000 to invest. Which of the two rates would yield the target amount in 1 year: 11% compounded daily or 10.9
    9·2 answers
  • What must be true of the units in two rates if one rate can be converted to the units of the other rate? In other words, the uni
    6·1 answer
  • Write a few sentences summarizing how to solve word problems that involve square roots
    13·1 answer
  • The sign for a new restaurant will be a triangle with a base of 8 feet and a height of 3 feet. The painter needs to know if he h
    13·1 answer
  • What is the answer of 2+y=11​
    13·2 answers
  • Find the slope: (-2,5) and (2,1
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!