A television sports commentator wants to estimate the proportion of citizens who "follow professional football." Complete parts (a) through (c).- [Click here to view the standard normal distribution table (page 1).]- [Click here to view the standard normal distribution table (page 2).]**(a)** What sample size should be obtained if he wants to be within 3 percentage points with 95% confidence if he uses an estimate of 48% obtained from a poll?The sample size is ___. (Round up to the nearest integer.)**(b)** What sample size should be obtained if he wants to be within 3 percentage points with 95% confidence if he does not use any prior estimates?The sample size is ___. (Round up to the nearest integer.)**(c)** Why are the results from parts (a) and (b) so close?- **A.** The results are close because the confidence 95% is close to 100%.- **B.** The results are close because 0.48(1 − 0.48) = 0.2496 is very close to 0.25.- **C.** The results are close because the margin of error 3% is less than 5%.

(a) Given that, Critical value: Using the z-table, the critical value at 95% confidence level is…

A television sports commentator wants to estimate the proportion of citizens who "follow professional football." Complete parts (a) through (c). Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) What sample size should be obtained if he wants to be within 3 percentage points with 95% confidence if he uses an estimate of 48% obtained from a poll? The sample size is I. (Round up to the nearest integer.) (b) What sample size should be obtained if he wants to be within 3 percentage points with 95% confidence if he does not use any prior estimates? The sample size is |. (Round up to the nearest integer.) (c) Why are the results from parts (a) and (b) so close? O A. The results are close because the confidence 95% is close to 100%. O B. The results are close because 0.48(1 - 0.48) = 0.2496 is very close to 0.25. O C. The results are close because the margin of error 3% is less than 5%.

A television sports commentator wants to estimate the proportion of citizens who "follow professional football." Complete parts (a) through (c). Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) What sample size should be obtained if he wants to be within 3 percentage points with 95% confidence if he uses an estimate of 48% obtained from a poll? The sample size is I. (Round up to the nearest integer.) (b) What sample size should be obtained if he wants to be within 3 percentage points with 95% confidence if he does not use any prior estimates? The sample size is |. (Round up to the nearest integer.) (c) Why are the results from parts (a) and (b) so close? O A. The results are close because the confidence 95% is close to 100%. O B. The results are close because 0.48(1 - 0.48) = 0.2496 is very close to 0.25. O C. The results are close because the margin of error 3% is less than 5%.

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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