The length of a rectangle is one foot less than twice the width. The area of the rectangle is 120 square feet. Find the dimensio
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HOW MANY PAIRS OF JEANS DOES SHE HAVE? Based on the merits, here it is
ASSUMING SHE HAS 5O PAIRS OF JEANS
ASSUMING WE DON'T KNOW HOW MANY PAIRS OF JEANS SHE HAS
ASSUMING SHE HAS 5O PAIRS OF JEANS
ASSUMING WE DON'T KNOW HOW MANY PAIRS OF JEANS SHE HAS
Answer:
The null hypothesis μ=4.0 could not be rejected.
Step-by-step explanation:
In this problem we have to perform a hypothesis test of the mean, with s.d. of the population unknown.
The sample is: [3.999, 4.037, 4.116, 4.063, 3.969, 3.955, 4.091]
This sample has a mean of 4.033 and a standard deviation of 0.061.
The null and alternative hypothesis are:
We assume a significance level of 0.05.
The test statistic for this test is:
We have a sample size n=7, so the degrees of freedom are 7-1=6.
For a two-tailed test, t=0.536 and df=6, the P-value can be look up in a t-table.
The P-value is 0.61. Is greater than the significance level, so the effect is not significant and the null hypothesis can't be rejected.
