Answer:
2.07
Step-by-step explanation:
Answer:
The critical value that should be used is T = 2.0796.
The 95% confidence interval for the mean repair cost for the dryers is between $91.912 and $105.648.
Step-by-step explanation:
We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 22 - 1 = 21
95% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 21 degrees of freedom(y-axis) and a confidence level of
. So we have T = 2.0796, which is the critical value that should be used.
The margin of error is:

In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 98.78 - 6.868 = $91.912
The upper end of the interval is the sample mean added to M. So it is 98.78 + 6.868 = $105.648
The 95% confidence interval for the mean repair cost for the dryers is between $91.912 and $105.648.
Answer:
yea what do you need help with?
Step-by-step explanation:
The product if a number if it is multiplied by 1 is the same number itself.
Given:
Product:
The product meaning in math is a number that you get to by multiplying two or more other numbers together.
Rules:
1) 1 is the multiplicative identity, if we multiply any of the number with 1 we get the same number as the answer to that.
2) So as per the rule if we multiply any of the whole numbers with 1 we get the same number.
Example:
= 1 * 155
= 155
= 1 * 688
= 688
= 1 * 97
= 97
Learn more about the number here:
brainly.com/question/17429689
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