A proposed null hypothesis states that there is no difference between the mean weights of the population of two neighboring districts. The sample mean difference is 12 kilograms, and the standard deviation of the distribution of the difference between sample means is 9 kilograms. Which statement is true?
The null hypothesis must be accepted if we choose the 68% confidence level.
The null hypothesis must be accepted if we choose the 95% confidence level.
The null hypothesis must be rejected if we choose the 99.7 % confidence level.
The null hypothesis must be rejected if we choose the 100%

Question

A proposed null hypothesis states that there is no difference between the mean weights of the population of two neighboring districts. The sample mean difference is 12 kilograms, and the standard deviation of the distribution of the difference between sample means is 9 kilograms. Which statement is true?
The null hypothesis must be accepted if we choose the 68% confidence level.
The null hypothesis must be accepted if we choose the 95% confidence level.
The null hypothesis must be rejected if we choose the 99.7 % confidence level.
The null hypothesis must be rejected if we choose the 100%

anonymous · Answer

Can someone help please will fan and give medal

anonymous · Answer

@amistre64

amistre64 · Answer

how many standard deviations does it take to make 12?

amistre64 · Answer

we take this test statistic and compare it to the z value associated with the intervals 

it we are outside the interval we reject the null