Calculate a 99% confidence interval for the unknown population mean of Income… 1 answer below »

Calculate a 99% confidence interval for the unknown population mean of Income. QUESTION 2 (4 marks) Test, at the 5% level of significance, whether the average age of people is different to 40? QUESTION 3 (4 marks) Test, at 5% level of significance, whether the average income is different for people Married or not (Married=1, No Married=2) [You may assume that the unknown population standard deviations for income is equal] QUESTION 4 (4 marks) Test, at the 5% level of significance, whether a person marital status is associated to the city where this person lives.

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