EBook Problems Estim L Mean

EBook Problems Set - Estimating a Population Mean: Large Samples Problems

Problem 1

Zandree is in charge of sampling widgit measurements from a very large population of widgits. lately her standard errors have been alarmingly high for her sample means. If she wants to decrease her sampling error (standard deviation of her sample means) by 1/2 what should she do?

• Choose one answer.

(a) Quadruple the variation inherent in the population.

(b) triple her sample size.

(c) Quadruple her sample size.

(d) Halve her sample size.

Answer

 (c)