Calculate cos theta to two decimal places. A. 0.69 B. 1.38 C. -0.07 D. 0.77
2 answers:
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Answer:
The degrees of freedom are:
The p value would be given by:
The p value is a large value and if we use a significance level of 0.05 or 0.1 we see that we can FAIL to reject the null hypothesis. And then we don't have enough evidence to conclude that her clients would save money on average by switching to the online company
Step-by-step explanation:
Information given
represent the mean for the difference
represent the sample deviation for the difference
sample size
represent the value that we want to test
represent the significance level
t would represent the statistic
represent the p value
System of hypothesis
We want to determine if that her clients would save money on average by switching to the online company, the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
The statistic for this case is given by:
(1)
Replacing the info given we got:
The degrees of freedom are:
The p value would be given by:
The p value is a large value and if we use a significance level of 0.05 or 0.1 we see that we can FAIL to reject the null hypothesis. And then we don't have enough evidence to conclude that her clients would save money on average by switching to the online company