A study by a bank compared the average savings of customers who were depositors for three years or less, with those who had been depositors for more than three years. The results of a sample are:
To test that the two groups of customers have equal savings rates, what is the critical value of z using$\alpha$ = 0.05? ___________

Question

A study by a bank compared the average savings of customers who were depositors for three years or less, with those who had been depositors for more than three years. The results of a sample are: 
 To test that the two groups of customers have equal savings rates, what is the critical value of z using$\alpha$ = 0.05? ___________

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The Answer of A study by a bank compared the average savings of customers who were depositors for three years or less, with those who had been depositors for more than three years. The results of a sample are: 
 To test that the two groups of customers have equal savings rates, what is the critical value of z using$\alpha$ = 0.05? ___________

A Study by a Bank Compared the Average Savings of Customers