Cybersecurity is a critical business issue that demands the attention of business and IT executives. According to a recent study, 67% of surveyed business and ITexecutives reported phishing scams at their institutions. Complete parts (a) and (b) below.a. If you conduct a follow-up study to estimate the population proportion of business and IT executives reporting phishing scams at their institutions, would you use aof 0.67 or 0.50 in the sample size formula?OA. Usex0.50 because this value will produce the greater sample size.B. Use t=0.67 because this value is an educated estimate of x.OC. Use x 0.67 because this value will produce the greater sample sizeD. Use x=0.50 because this value is an educated estimate of a A bank report looks at what strategies and measures financial institutions are pursuing to provide mobile financial services to their customers. In a response to asurvey question about barriers hindering greater consumer adoption of mobile banking, in a survey of 126 financial institutions, 85 said security concerns are abarrier, 71 said lack of trust in the technology is a barrier, and 18 said difficulty of use was a barrier. Compiete parts (a) through (d) belowa. Construct a 90% confidence interval estimate of the population proportion of financial institutions who said that security concems are a barrier hindering greaterconsumer adoption of mobile bankingsas (Round to three decimal places as needed.)

Given that, Cybersecurity is a critical business issue that demands the attention of business and IT…

Answered: A bank report looks at what strategies…

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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An issue of Time Style and Design reported on a poll conducted by Schulman Ronca &Bucuvalas Public Affairs about the shopping habits of wealthy Americans.A total of 603 interviews were conducted among a national sample of adults with householdincomes of at least $150,000. Of the adults interviewed, 410 said they had purchased clothing,accessories, or books online in the past year.a. Find a 95% confidence interval for the proportion of all U.S. adults with householdincomes of at least $150,000 who purchased clothing, accessories, or books online inthe past year.b. Interpret the confidence interval.
Microsoft periodically issues a Security Bulletin that re-ports the software affected by the vulnerability. In a sample of 50 bulletins issued in a recent year, 32 reported a security problem with Microsoft Windows. a. Find a point estimate of the proportion of security bulletins issued that reported a problem with Windows during the year. b. Find an interval estimate for the proportion, part a. Use a 90% confidence interval. c. Practically interpret the confidence interval, part b. Your answer should begin with, "We are 90% confident .. ".
3. In a survey of 2241 adults in a recent year, 650 say they made a New Year's resolution to eat healthier. Construct, by hand, a 95% confidence interval estimate of the proportion of all adults who made a New Year's resolution to eat healthier. b. Interpret your confidence interval in context of the problem. a.
Find a 95% confidence interval for the percentage of stocks with a gain.
Credit card ownership varies across age groups. Suppose that the estimated percentage of people who own at least one credit card is 64% in the 18–24 age group, 84% in the 25–34 age group, 75% in the 35–49 age group, and 77% in the 50+ age group. Suppose these estimates are based on 465 randomly selected people from each age group. (a) Construct a 95% confidence interval for the proportion of people in the 18–24 age group who own at least one credit card. (Round your answers to four decimal places.) to Construct a 95% confidence interval for the proportion of people in the 25–34 age group who own at least one credit card. (Round your answers to four decimal places.) to Construct a 95% confidence interval for the proportion of people in the 35–49 age group who own at least one credit card. (Round your answers to four decimal places.) to Construct a 95% confidence interval for the proportion of people in the 50+ age group who own at least one credit card. (Round your answers to four…
In a study designed to determine whether there was a cluster of brain cancer cases at a Pratt & Whitney plant, record from 223,000 employees were studied and 723 employees with brain tumors were found. Treat those employees as a random sample and construct a 95% confidence interval estimate of the proportion of all adults who develop such tumors. write a brief statement interpreting that confidence interval.
3. The Pew Research Center has conducted extensive research on the young adult population (Pew Research website, November 6, 2012). One finding was that 93% of adults aged 18 to 29 use the Internet. Another finding was that 21% of those aged 18 to 28 are married. Assume the sample size associated with both findings is 500. a) Develop a 95% confidence interval for the proportion of adults aged 18 to 29 who use the Internet. b) Develop a 99% confidence interval for the proportion of adults aged 18 to 28 who are married. c) In which case, part (a) or part (b), is the margin of error larger? Explain why.
A study examined the interactions in a children's museum. (Interactions by visitors to the museum included show-and-tell, learning, teaching, refocusing, participatory play, advocating, and disciplining interactions.) Researchers observed a sample of 154 meaningful interactions, of which 73 were led by children and 81 were led by adult caregivers the target point estimate is 0.474 what is The 90% confidence interval?
5.) A genetic experiment with peas resulted in one sample of offspring that consisted of 410 green peas and 151 yellow peas. a. Construct a 90% confidence interval to estimate of the percentage of yellow peas. b. It was expected that 25% of the offspring peas would be yellow. Given that the percentage of offspring yellow peas is not 25%, do the results contradict expectations?
d. What is the upper bound for the confidence interval? e. Interpret the confidence interval you have calculated

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