A market researcher at a major clothing company that has traditionally relied on

Question

A market researcher at a major clothing company that has traditionally relied on catalog mail-order sales decides to investigate whether the amount of monthly online sales has changed. She compares the mean monthly online sales of the past several months with a historical figure for mean monthly sales for online purchases. She gets a P-value of 0.01.Explain in this context what the 1% means. What does the 1% P-value mean? O A. If the mean monthly sales due to online purchases has changed, there is a 1% chance (or 1 out of every 100 samples) that the resulting mean sales would not occur assuming the historical mean for sales O B. If the mean monthly sales due to online purchases has not changed, there is a 1% chance (or 1 out of every 100 samples) that the resulting mean sales would occur assuming the historical mean for sales. Online purchases make up 1% of all sales. Because the percentage of online sales is so small, the resulting mean is insignificant. Online purchases make up 1% of all sales. The resulting mean sales would not occur assuming the historical mean C. 0 D. for sales.

Explanation / Answer

p value is the probability of type 1 error , which is rejecting null hypothesis when we should not

so this means that we favor alternate hypothesis when infact null hypothesis was true
so the correct choice is B

when we say that the month sales has changed as an alternative hypothesis , there is 1% chance that we are wrong and the sales has actually not changed

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