Test Hypotheses About a Population Proportion
-In One Area, Monthly $\$ 650$

Test Hypotheses about a Population Proportion
-In one area, monthly incomes of technology related workers have a standard deviation of $\$ 650$ . It is believed that the standard deviation of monthly incomes of non-technology workers is higher. A sample of 71 non-technology workers are randomly selected and found to have a standard deviation of $\$ 950$ . Test the claim that non-technology workers have a higher standard deviation. Use $\alpha = 0.05$ .