Complete Question
The complete question is shown on the first uploaded image
Answer:
a
The test statistic for μ1 - μ2 is

b
The standardized test statistic for μ1 - μ2 is
c
No
d
Fail to reject null hypothesis
At the 1% significance level , there is insufficient evidence to support the claim
Explanation:
From the question we are told that
The given data is





Now the test statistic is mathematically evaluated as


The standardized test statistic is mathematically represented as

substituting values
Now the standardized test statistic is not in the rejection region because the z value of
is 2.33 and the standardized test statistic is greater than that hence it is not in the rejection region
This implies that the test statisties failed to reject the null hypothesis at significance level of 0.01 , there insufficient evidence to support the claim