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Coursepack, p. 657 MAT 133: 9.1 WS 3, p.2 4. A 2013 survey was conducted of 2039 random College students and recorded the percentage that said they wanted online textbooks available for their courses. (Source). The confidence interval results are shown below: One sample proportion summary confidence interval: p : Proportion of successes Method: Standard-Wald 94% confidence interval results: Proportion Count Total Sample Prop. Std. Err. L. Limit U. Limit p 2039 0.0085079579 0.8040081 0.83601152 a. What is the confidence level? b. What is the confidence interval? (Give 3 decimal places) c. Compute the critical values, + za . (Give 4 decimal place; Show accurately shaded/labeled graph & all work) d. Compute the point estimate of the proportion of College students that said they want online textbooks. (Hint: Use the interval). (Give 2 decimal places) e. Using the answer for part d, compute how many College students that said they want online textbooks. Round to the nearest whole number. f. Compute the margin of error for the confidence interval. (Give 3 decimal places)