Using the t-distribution, it is found that the p-value of the test is 0.007.
At the null hypothesis, it is <u>tested if the mean lifetime is not greater than 220,000 miles</u>, that is:
At the alternative hypothesis, it is <u>tested if the mean lifetime is greater than 220,000 miles</u>, that is:
.
We have the <u>standard deviation for the sample</u>, thus, the t-distribution is used. The test statistic is given by:
The parameters are:
- is the sample mean.
- is the value tested at the null hypothesis.
- s is the standard deviation of the sample.
- n is the sample size.
For this problem:
Then, the value of the test statistic is:
We have a right-tailed test(test if the mean is greater than a value), with <u>t = 2.69</u> and 23 - 1 = <u>22 df.</u>
Using a t-distribution calculator, the p-value of the test is of 0.007.
A similar problem is given at brainly.com/question/13873630
(60(100-5)/100)(100+5)/100
60(95/100)(105/100)
60(.95)(1.05)
$59.85
Answer:
A is correct, 7 units. Hope this helps! :)
Answer:
<u>Subtract 24x from both sides</u>
<u></u><u></u>
<u></u>
<u>Add 6 to both sides</u>
<u></u><u></u>
<u></u>
<u>Divide both sides by -18</u>
<u></u><u></u>
Answer:
161 feet
Step-by-step explanation:
80.5 * 2 = 161 Feet
We multiply by 2 due to them swimming down and back