A proposed null hypothesis states that there is no difference in the population mean heights of males of two neighboring towns. The sample mean difference is found to be 10 cm, and the standard deviation of the difference of the sample means is 6 cm. Which statement is true? A.
The null hypothesis must be rejected if we choose the 68% confidence level.

B.
The null hypothesis must be rejected if we choose the 95% confidence level.

C.
The null hypothesis must be rejected if we choose the 99.7% confidence level.

D.
The null hypothesis must be rejected if we choose the 100% confidence level.

step-by-step explanation:

0.85% : )

step-by-step explanation:

yes, gavin is right.

step-by-step explanation:

gavin is correct. 

this problem is about converting 9% per year to how many percent per quarter. the rate is still the same. it only differed in the time period. so, through dimensional analysis,

9% per year  × (1 year / 4 quarters) = 2.25% per quarter

if he was asked to convert 9% per year to how many percent per quarter  compounded quarterly, then you will not simply divide by four. this is because compounding is not linear.

hope this , have a good day. c;

the answer is -1 1/5, also a

hope i

-lavira : )