### 10 Problems : Hypothesis Testing, Z-Tests, Standard Deviation, P-Values and Type I and Type II Errors

1. A z-test is to be performed for a population mean. Express the decision criterion for the hypothesis in terms of _X , That is, determine for what values of _X the null hypothesis would be rejected. A hypothesis test is to be performed to determine whether the mean waiting time during peak hours for customers in a supermarke