Question: Refer to Exercise 6 55 In exercise a To what populations are

Refer to Exercise 6.55.
In exercise
a. To what populations are the conclusions obtained in Exercise 6.55 relevant?
b. A more precise estimate of the mean expenditure for female candidates is requested. How many female candidates would need to be included in the new study to estimate the mean expenditure using a 95% confidence interval having a width of at most $ 10?

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