statistic - Ans.fyi 參考答案

statistic

2009-06-09 10:00 pm

The marketing manager of a computer manufacturer believes that the
demand of a newly released electronic book reader should be at least
1,200. Relevant data are collected from a random sample of potential
customers. The manager is going to perform a hypothesis test and if there
is sufficient evidence to support his belief, 1,200 book readers will be
produced.

a State the null and alternative hypothesis for the above situation.

b Explain the meaning of Type I and Type II errors with reference to
the above situation.

回答 (1)

Prof. Physics

2009-06-10 1:40 am

✔ 最佳答案

Let u be the demand of the book reader

a. Null hypothesis, H0: u = 1200

Alternative hypothesis, H1: u < 1200

b. For type I error, it is that the demand of the book reader is at least 1200, but we still reject the null hypothesis and claim that it is less than 1200.

For type II error, it is that the demand of the book reader is less than 1200, but we accept the null hypothesis and claim that is is at least 1200.

參考: Physics king

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