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1. A business school claims that students who complete a 3-month typing course can type a...

1. A business school claims that students who complete a 3-month typing course can type a mean of more than 1200 words an hour. A random sample of 25 students who completed this course typed a mean of 1163 words an hour, with a sample standard deviation of 87 words. Assume that typing speeds for all students who complete this course have an approximately normal distribution.

(a) Using the critical value method and a significance level of 1%, is there evidence to support the business school’s claim?

(b) What would a Type II error be in this case?

*Please explain*

Math   Statistics-And-Probability   
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Note-if there is any understanding problem regarding this please feel free to ask via comment box..thank you

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