Abond analyst is analyzing the interest rates for equivalent municipal bonds issued by two different states. at α = 0.05, we wish to test whether there is enough evidence to conclude that there is a difference in the interest rates paid by the two states. what is the value of the test statistic? state a state b sample size 80 50 mean interest rate (%) 4.0 4.5 population variance 0.04 0.03

15.08

Step-by-step explanation:

The test statistic for difference between two population means is given by :-

Given :                             State A   State B

Sample size                       80            50

Mean interest rate (%)        4.0           4.5

Population variance           0.04        0.03

Then , the test statistic for difference between two population means will be :-

Hence, the value of the test statistic will be 15.08 .

the correct answer is b) histograms can be used to exhibit the shape of distributions. this is because histograms count the frequency of each possible answer, so one is able to see which results are more common and which are less common.