Introductory Statistics for Business and Economics by Jan Ubøe

Author:Jan Ubøe
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

(b)As test static we use

What is the distribution of T when H 0 is true?

(c)What is the rejection region if we use a significance level of 5%?

(d)We observe and S X = 0. 05. Which conclusion can we draw from this?

9.4. A small company has introduced flextime as a means to reduce absence due to illness. Before the introduction of flextime, the average absence due to illness was 11 days per year. Let X be the total number of days a randomly selected worker is absent due to illness during a whole year. Assume that X is normally distributed with expectation μ and variance σ 2. The company has 36 workers. (a)What is the natural null hypothesis and alternative hypothesis?

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