**Page 93**30. Robberies Find the sample size needed to estimate the percentage of robberies in Texas that result in arrests. Use a 0.04 margin of error, use a confidence level of 80%, and assume that \( \hat{p} \) and \( \hat{q} \) are unknown.32. Fortune Tellers Find the sample size needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.03 margin of error, use a confidence level of 98%, and use results from a prior Pew Research Center poll suggesting that 15% of adults have consulted fortune tellers.34. Windows Penetration You plan to develop a new software system that you believe will surpass the success of Google and Facebook combined. In planning for the operating system that you will use, you need to estimate the percentage of computers that use Windows. How many computers must be surveyed in order to be 99% confident that your estimate is in error by no more than one percentage point?a. Assume that nothing is known about the percentage of computers with Windows operating systems.b. Assume that a recent survey suggests that about 90% of computers use Windows operating systems (based on data from Net Applications).c. Does the additional survey information from part (b) have much of an effect on the sample size that is required?

Answered: Image /qna-images/answer/fcb9ca2f-a989-4c26-a193-9f76865e5dc2.jpg

30. Robberies Find the sample size needed to estimate the percentage of robberies in Texas that result in arrests. Use a 0.04 margin of error, use a confidence level of 80%, and assume that p and â are unknown.

30. Robberies Find the sample size needed to estimate the percentage of robberies in Texas that result in arrests. Use a 0.04 margin of error, use a confidence level of 80%, and assume that p and â are unknown.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Use a 0.02 margin of error and use a confidence level of 90%. Complete parts (a) through (c) below.
8. Construct the confidence interval for the population variance for the given values. Round your answers to one decimal place. Answer: Lower endpoint: n = 24, s² = 3.9, and c = 0.99 Upper endpoint:
Subject - account Please help me. Thankyou.
Find the sample size needed to estimate the percentage of residents of one region of a country who are left-handed. Use a margin of error of six percentage points, and use a confidence level of 99%. Complete parts (a) through (c) below.
Find the sample size needed to estimate the percentage of adults who can wiggle their ears. Use a margin of error of 3 percentage points and use a confidence level of 95%. Complete parts (a) and (b) below. a. Assume that p and q are unknown. n= (Round up to the nearest integer.) b. Assume that 25% of adults can wiggle their ears. n= (Round up to the nearest integer.) C
Find the sample size needed to estimate the percentage of adults who can wiggle their ears. Use a margin of error of 3 percentage points and use a confidence level of 90%. Complete parts (a) and (b) below. a. Assume that p and q are unknown. n= (Round up to the nearest integer.)
find the sample size needed to estimate the percentage of adults who can wiggle their ears. use a margin of error of 4 percentage and use a confidence level of 95%. complete parts (a) and (b) below. b. assume that 21% of adults can wiggle their ears. b. Assume that 21% of adults can wiggle their ears
Find the sample size needed to estimate the percentage of adults who can wiggle their ears. Use a margin of error of 5 percentage points and use a confidence level of 90%. Complete parts (a) and (b) below. a. Assume that p and q are unknown. n = (Round up to the nearest integer.)
4. on paper. random sample of 130 human body temperatures had a mean 98.25 degree and astandard deviation of 0.73 degree. Construct a 99% confidence interval for the average body temperature ofhealthy people.
7. use the given confidence interval to find the margin of error and the sample proportion. a. (0.719,0.745) b. (0.753,0.777)
Researchers studied the mean egg length (in millimeters) for a bird population. After taking a random sample of eggs, they obtained a 95% confidence interval of (45,60). What is the value of the margin of error? Choose the correct answer below. A. 15 mm B. 52.5 mm O c. 7.5 mm O D. 1.96
Use a 0.05 margin of error and use a confidence level of 99%. Complete parts (a) through (c) below.