Suppose a consultant claims a training course will increase typing speed by at least 10 words per minute A manager enrolls 15 employees and notes an increase of only 7 words per minute with a standard deviation 2 5 What are the appropriate null and alternative hypotheses Explain Is this a right, left, or 2 tailed test Explain What is the rule for rejecting a null hypothesis based on a t statistic For what values of the t statistic will you reject the null hypothesis at a 5 significance level Find the test statistic and interpret the result of the test What is a Type 1 error What is a Type 2 error Explain the difference between Type I and Type II errors in this context

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Question: Suppose a consultant claims a training course will increase typing speed by at least 10 words per minute. A manager enrolls 15 employees and notes

Suppose a consultant claims a training course will increase typing speed by at least 10 words per minute. A manager enrolls 15 employees and notes an increase of only 7 words per minute with a standard deviation 2.5.

What are the appropriate null and alternative hypotheses? Explain.
Is this a right, left, or 2 tailed test? Explain.
What is the rule for rejecting a null hypothesis based on a t statistic?
For what values of the t statistic will you reject the null hypothesis at a 5% significance level?
Find the test statistic and interpret the result of the test.
What is a Type 1 error?
What is a Type 2 error?
Explain the difference between Type I and Type II errors in this context.

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