Question

7. An economist wants to estimate the mean per capita income (in thousands of dollars) for...

7. An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in California. Suppose that the mean income is found to be $25.8 for a random sample of 2323 people. Assume the population standard deviation is known to be $9. Construct the 98% confidence interval for the mean per capita income in thousands of dollars. Round your answers to one decimal place.

Lower endpoint:

Upper endpoint:

8. Consider the value of t such that 0.05 of the area under the curve is to the right of t.

Step 1 of 2: Select the graph which best represents the given description of t.

Step 2 of 2: Assuming the degrees of freedom equals 1616, select the t value from the t table.

Homework Answers

Answer #1

Lower endpoint = 21.43

Upper endpoint = 30.17

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