**Sports Cars**In a random sample of 28 sports cars, the average annual fuel cost was $2929 and the standard deviation was $786. Construct a 90% confidence interval for the mean annual fuel cost. Interpret the results. Assume the annual fuel costs are normally distributed. *(Adapted from U.S. Department of Energy)***ONLY ANSWER THE QUESTIONS BELOW. DO NOT ACTUALLY CONSTRUCT THE CONFIDENCE INTERVAL.**(a) What type of confidence interval are we forming? (circle one) A. Confidence interval for μ, σ known. B. Confidence interval for μ, σ unknown. C. Confidence interval for p.(b) What type of critical value will be used? (circle one) A. zα/2 B. tα/2(c) Which formula will be used for the standard error? (circle one) A. $\frac{\sigma}{\sqrt{n}}$ B. $\frac{s}{\sqrt{n}}$ C. $\sqrt{\frac{\hat{p}(1-\hat{p})}{n}}$

From the provided information,Confidence level = 90%

Answered: Sports Cars In a random sample of 28…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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