For b) choose either estimate calculated using 0.64 or conservative estimate In 2010, an online security firm estimated that 64% of computer users don't change their passwords very often. Because this estimate may be outdated, suppose that you want to carryout a new survey to estimate the proportion of students at your school who do not change their password. You would like to determine the sample size required to estimate thisproportion to within a margin of error of 0.05 with 95% confidence.A USE SALT(a) Using 0.64 as a preliminary estimate, what is the required sample size if you want to estimate this proportion with a margin of error of 0.05? (Round your answer up to the nearestwhole number.)Calculate the required sample size using the conservative value of 0.5. (Round your answer up to the nearest whole number.)How do the two sample sizes compare?The sample size calculated using 0.64 is ---Select---Select-v the sample size calculated using the conservative estimate.smaller than(b) What sample size would you recommend the same asanswer.The --Select---v shoullarger thanhis study because it will guarantee a margin of error of no greater than 0.05. The other sample size calculated will onlyor if p <guarantee a margin of error no greater than 0.05 if p > In 2010, an online security firm estimated that 64% of computer users don't change their passwords very often. Because this estimate may be outdated, suppose that you want to carryout a new survey to estimate the proportion of students at your school who do not change their password. You would like to determine the sample size required to estimate thisproportion to within a margin of error of 0.05 with 95% confidence.A USE SALT(a) Using 0.64 as a preliminary estimate, what is the required sample size if you want to estimate this proportion with a margin of error of 0.05? (Round your answer up to the nearestwhole number.)Calculate the required sample size using the conservative value of 0.5. (Round your answer up to the nearest whole number.)How do the two sample sizes compare?The sample size calculated using 0.64 is ---Select--- v the sample size calculated using the conservative estimate.(b) What sample size would you recommend? Justify your answer.v should be used for this study because it will guarantee a margin of error of no greater than 0.05. The other sample size calculated will onlyThe --Select---guarantee a margin of error no greater than 0.05 if p >or if p <

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Description: For b) choose either estimate calculated using 0.64 or conservative estimate In 2010, an online security firm estimated that 64% of computer users don't change their passwords very often. Because this estimate may be outdated, suppose that you want t

p⏞=estimated proportion=0.64E=margin of error=0.05α=significance level=0.05 We want to determine…

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đón't change their passwords very often. Because this estimate may be outdated, suppose that you want to carry out a new survey to estimate the proportion of students at your school who do not change their password. You would like to determine the sample size required to estimate this proportion to within a margin of error of 0.05 with 95% confidence. n USE SALT (a) Using 0.64 as a preliminary estimate, what is the required sample size if you want to estimate this proportion with a margin of error of 0.05? (Round your answer up to the nearest whole number.) Calculate the required sample size using the conservative value of 0.5. (Round your answer up to the nearest whole number.) How do the two sample sizes compare? **.*... The sample size calculated using 0.64 is -Select--v the sample size calculated using the conservative estimate. -Select- smaller than (b) What sample size would you recommend the same as answer. larger than The --Select- guarantee a margin of error no greater than 0.05 if p > v shoul his study because it will guarantee a margin of error of no greater than 0.05. The other sample size calculated will only or if p <

đón't change their passwords very often. Because this estimate may be outdated, suppose that you want to carry out a new survey to estimate the proportion of students at your school who do not change their password. You would like to determine the sample size required to estimate this proportion to within a margin of error of 0.05 with 95% confidence. n USE SALT (a) Using 0.64 as a preliminary estimate, what is the required sample size if you want to estimate this proportion with a margin of error of 0.05? (Round your answer up to the nearest whole number.) Calculate the required sample size using the conservative value of 0.5. (Round your answer up to the nearest whole number.) How do the two sample sizes compare? **.*... The sample size calculated using 0.64 is -Select--v the sample size calculated using the conservative estimate. -Select- smaller than (b) What sample size would you recommend the same as answer. larger than The --Select- guarantee a margin of error no greater than 0.05 if p > v shoul his study because it will guarantee a margin of error of no greater than 0.05. The other sample size calculated will only or if p <

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 this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.In a survey of 1000 large corporations, 246 said that, given a choice between a job candidate who smokes and an equally qualified nonsmoker, the nonsmoker would get the job. (a) Let p represent the proportion of all corporations preferring a nonsmoking candidate. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 0.95 confidence interval for p. (Round your answers to three decimal places.) lower limit     upper limit     What is the margin of error based on a 95% confidence interval? (Round your answer to three decimal places.)
For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.In a marketing survey, a random sample of 982 supermarket shoppers revealed that 262 always stock up on an item when they find that item at a real bargain price. (a) Let p represent the proportion of all supermarket shoppers who always stock up on an item when they find a real bargain. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 95% confidence interval for p. (Round your answers to three decimal places.) lower limit     upper limit
For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.In a marketing survey, a random sample of 986 supermarket shoppers revealed that 268 always stock up on an item when they find that item at a real bargain price. (a) Let p represent the proportion of all supermarket shoppers who always stock up on an item when they find a real bargain. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 95% confidence interval for p. (Round your answers to three decimal places.) lower limit     upper limit     What is the margin of error based on a 95% confidence interval? (Round your answer to three decimal places.)
For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.In a marketing survey, a random sample of 992 supermarket shoppers revealed that 274 always stock up on an item when they find that item at a real bargain price. (a) Let p represent the proportion of all supermarket shoppers who always stock up on an item when they find a real bargain. Find a point estimate for p. (Enter a number. Round your answer to four decimal places.) (b) Find a 95% confidence interval for p. (For each answer, enter a number. Round your answers to three decimal places.)lower limit upper limit Give a brief explanation of the meaning of the interval. We are 95% confident that the true proportion of shoppers who stock up on bargains falls within this interval.We are 5% confident that the true proportion of shoppers who stock up on bargains falls above this interval. We are 5% confident that the true proportion of shoppers who…
A sample of students is to be selected to estimate the proportion who have recieved a medical examination during the past year. The survey found that x =567 students were examined during the past year. Construct a 95% interval estimate of the population proportion if the sample size was n=700
An author claimed that his annual book sales increased after the year 2000. Past data indicates that the average annual sales for his books are Php 200 M (200 million pesos). The data for the annual sales are normally distributed as shown (in million peso): 2000: 50 2001: 782006: 4002011: 1892016: 83 2002: 3002007: 2902012: 2052017: 132 2003: 2502008: 932013: 3722018: 173 2004: 2002009: 1522014: 4262019: 195 2005: 1852010: 2372015: 252020: 450 Are the author's words true at 98% confidence? In your complete solution, state the null and alternative hypothesis and the complete calculation of test statistic.
your car is more crowded than you think. table 5.8 reports results from a 1969 personal transportation survey on "home-to-work" trips in metropolitan areas. The survey stated that the average car occupancy was 1.4 people. check that calculation.