A Random Sample of 100 Families in a Large City $\beta$

Essay

A random sample of 100 families in a large city revealed that on the average these families have been
living in their current homes for 35 months. From previous analyses, we know that the population
standard deviation is 30 months and that ? = 0.2061.
a. Recalculate $\beta$ if $\alpha$ is lowered from 0.05 to 0.01.
b. What is the effect of decreasing the significance level on the value of $\beta$ ?