Determine the sample size n needed to construct a 90% confidence interval to estimatethe population proportion for the following sample proportions when the margin of errorequals 4%.a. p = 0.20b. p=0.30C. D=0.40a. n =(Round up to the nearest integer.)

According to the given information in this questionWe need to find sample size

Answered: Determine the sample size n needed to…

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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For the provided sample mean, sample size, and population standard deviation, complete parts (a) through (c) below. x= 30, n= 64, 6 = 2 a. Find a 95% confidence interval for the population mean. The 95% confidence interval is from to (Round to two decimal places as needed.)
The high price of medicines is a source of major expense for those seniors in the United States who have to pay for these medicines themselves. A random sample of 1600 seniors who pay for their medicines showed that they spent an average of $4300 last year on medicines with a standard deviation of $500. Make a 90% confidence interval for the corresponding population mean. Round your answers to cents. i to $ i %24
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In a study of government financial aid for college students, it becomes necessary to estimate the percentage of full-time college students who earn a bachelor's degree in four years or less. Find the sample size needed to estimate that percentage. Use a 0.04 margin of error and use a confidence level of 95%. Complete parts (a) through (c) below. a. Assume that nothing is known about the percentage to be estimated. n= (Round up to the nearest integer.) b. Assume prior studies have shown that about 55% of full-time students earn bachelor's degrees in four years or less. n= (Round up to the nearest integer.) c. Does the added knowledge in part (b) have much of an effect on the sample size? O A. No, using the additional survey information from part (b) does not change the sample size. O B. Yes, using the additional survey information from part (b) dramatically reduces the sample size. Oc. Yes, using the additional survey information from part (b) only slightly increases the sample size. O…
6. a. fine the margin of error for the given values of c, s and n c=0.98, s=6, n=9 b. Find the margin of error for the given values of c, s and n. c=0.98, s=2.8, n=25 c. construct the indicated confidence interval for the population mean u using the t-distribution. Assume the population is normally distributed. c=0.99, x=14.5,s=3.0,n=9 d. construct the indicated confidence interval for the population mean u using the t-distribution. Assume the population is normally distributed. c=0.99, x=14.4, s=0.66, n=15
In a study of government financial aid for college students, it becomes necessary to estimate the percentage of full-time college students who earn a bachelor's degree in four years or less. Find the sample size needed to estimate that percentage. Use a 0.03 margin of error and use a confidence level of 99%. Complete parts (a) through (c) below. a. Assume that nothing is known about the percentage to be estimated. n = (Round up to the nearest integer.) b. Assume prior studies have shown that about 55% of full-time students earn bachelor's degrees in four years or less. (Round up to the nearest integer.) c. Does the added knowledge in part (b) have much of an effect on the sample size? O A. No, using the additional survey information from part (b) only slightly reduces the sample size. O B. Yes, using the additional survey information from part (b) dramatically reduces the sample size. O C. No, using the additional survey information from part (b) does not change the sample size. D.…
. For each of the following sample proportions and sample sizes, compute a 99% confidence interval for the population proportion using both the standard largesample procedure and the WAC adjusted procedure. Comment in each case on whether or not the WAC adjustment was necessary. (b) n = 50; sample proportion = 0.20.
In a study of government financial aid for college students, it becomes necessary to estimate the percentage of full-time college students who earn a bachelor's degree in four years or less. Find the sample size needed to estimate that percentage. Use a 0.04 margin of error and use a confidence level of 99%. Complete parts (a) through (c) below. a. Assume that nothing is known about the percentage to be estimated. n = (Round up to the nearest integer.) b. Assume prior studies have shown that about 60% of full-time students earn bachelor's degrees in four years or less. n = (Round up to the nearest integer.) c. Does the added knowledge in part (b) have much of an effect on the sample size? O A. No, using the additional survey information from part (b) only slightly reduces the sample size. B. Yes, using the additional survey information from part (b) only slightly increases the sample size. C. No, using the additional survey information from part (b) does not change the sample size. O…

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Determine the sample size n needed to construct a 90% confidence interval to estima the population proportion for the following sample proportions when the margin of erro equals 4%. a. p = 0.20 b. p=0.30 C. D = 0.40 a. n = (Round up to the nearest integer.)