Q4) a&b a) Carry out a one-sided Gaussian test at the 0.05 level using an example that you have chosen and reject the null hypothesis. And interpret the test decision of the one-sided Gaussian test....

Q4) a&b

a) Carry out a one-sided Gaussian test at the 0.05 level using an example that you have chosen and reject the null hypothesis. And interpret the test decision of the one-sided Gaussian test. The sample may be thought out.
b) Why is a one-sided Gaussian test carried out when it is already clear in the sample whether the arithmetic mean has a higher or lower value than the expected one
Value?