State the conclusion based on the results of the test According to the report, t

Question

State the conclusion based on the results of the test According to the report, the standard deviation of monthly cell phone bills was $49.48 three years ago. A researcher suspects that the standard deviation of monthly cell phone bills is less today. The null hypothesis is not rejected. Choose the correct answer below O A. There is not sufficient evidence to conclude that the standard deviation of monthly cell phone bills is less than its level three years ago of $49.48 SAT B. ° C. Tere is sufficient evidence to conclude that the standard deviation of monthly cell phone bills is different from its level th ee years ago of S4948 There is sufficient evidence to conclude that the standard deviation of monthly cell phone bils is less than its level th ee years ag of S4948 nts for Click to select your answer

Explanation / Answer

First, we need to write the null hypothesis and alternate hypothesis in order to understand the question

Null hypothesis:- the standard deviation of the monthly bill is equal or greater than its level three years ago of $49.48

Alternate hypothesis:- the standard deviation of the monthly bill is less than its level three years ago of $49.48

Test data shows that the null hypothesis is not rejected, this means there is not enough data to conclude that the standard deviation of the monthly bill is less than its level three years ago of $49.48

so, option A is correct

There is no sufficient evidence to conclude that the standard deviation of the monthly bill is less than its level three years ago of $49.48

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