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Question: please put clear and easy to read responses thank you...

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PLEASE PUT CLEAR AND EASY TO READ RESPONSES! THANK YOU!

1. Below are the graphs of a standard Normal distribution and a t-distribution with 3 degrees of freedom. (a) Indicated which graph is which and explain how you know. Dotted graph Solid graph- 3-2 1 (b) On the same figure sketch a graph of a t-distribution with 1 degree of freedom. 2. Find the critical value for each of the following confidence intervals: (a) 95% confidence interval with 8 degrees (b) 80% confidence interval when n-20 of freedom You want to estimate the mean fuel efficiency of Ford Focus automobiles with 99% confidence and a margin of error of no more than 1 mile per gallon. Preliminary data suggests that σ-2.4 miles per gallon is a reasonable estimate of the standard deviation for all cars of this make and model. How large a sample do you need? 3.

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