According to a poll, 83% of California adults (420 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of California adults who feel that education is one of the top issues facing California. What is a point estimate for the true population proportion?

Q: 2. Why do we feel more confident with a 99 percent confidence interval than a 90 percent confidence…

A: It is needed to define the reason for being more confident for a 99% confidence interval than a 90%…

Q: According to a poll, 81% of California adults (409 out of 506 surveyed) feel that education is one…

A: Point estimate=0.81

Q: You're considering going to graduate school, and you would like to know how many people would…

A:

Q: In a Gallup poll of 804 randomly selected adults living in the 50 U.S. states and the District of…

A: Answer x =466n =804Confidence interval =95%

Q: Suppose you want to produce an estimate on the percent of students who return to college after their…

A:

Q: A Pew Internet Project Data Memo presented data comparing adult gamers with teen gamers with respect…

A: Given : p̂1 = 0.54 p̂12 = 0.89 n1 = 1063 n2 = 1064

Q: Suppose a consumer advocacy group wants to conduct a survey to find if the proportion of consumers…

A:

Q: What do statisticians mean by confidence limits?

A: Confidence limits are the minimum and maximum values above and below which we are confident that a…

Q: According to a Field Poll conducted February 8 – 17, 2005, 79% of California adults (actual results…

A: 79% of California adults feel that “education and our schools” is one of the top issues facing…

Q: Construct a 99.8% confidence interval for the proportion of women who work at home who are college…

A: Given,n=519x=165p^=xnp^=165519=0.318The point estimation for the proportion is 0.318 .

Q: A group of researchers are studying the difference in ethical perceptions between male and female…

A: Given: The number of female students who responded no to cheat in order to get a high grade are…

Q: Public Policy Polling recently conducted a survey asking adults across the U.S. about music…

A: Given data  N = 571 X = 80 99% confidence interval

Q: An accounting research firm asked 2100 accountants “Have you ever fudged the numbers before?” and…

A: The sample size is 2100 and 40% responded yes.

Q: 88% of California adults (444 out of 506 surveyed) feel that education is one of the top issues…

A: The value of z at a 90% confidence level is 1.645, which can be obtained by using the standard…

Q: 1. A survey of 224 children of ages 9 to 17 was conducted shortly after 1986 space-shuttle disaster.…

A:

Q: . How many of the 3335 subjects used at least one prescription​ medication? b. Construct a​ 90%…

A: n = 3335 p = 0.804

Q: Define the confidence level?

A: It is the likelihood of containing the true population parameter under the confidence interval when…

Q: You're considering going to graduate school, and you would like to know how many people would…

A: From the provided information Sample size (n) = 29, People who recommend x = 9 The sample proportion…

Q: Explain in words what effect an increase in confidence level would have on the width of the…

A: Given information: The statement is given related to the effect of an increase in confidence level…

Q: 1. In a recent poll 62 out of 149 randomly chosen students at Allen High School say they plan to buy…

A:

Q: 2. In 2001, a Gallup poll surveyed 1016 households in the U.S about their pets. Of those surveyed,…

A: Given;n = 1016 x = 599p' = xn=5991016=0.58957

Q: The Malayo Colleges Mindanao recently conducted a study analyzing the privacy management habits of…

A:

Q: A national poll found that 684 people out of 1100 believe in UFO’s. Answer the following questions.…

A: Given data,Number of people n=1100People who believe in UFO is x=684Find the 94% confidence interval

Q: To devise effective marketing strategies it is helpful to know the characteristics of your…

A: Givensample size(n)=932x=543p^ =xn=543932=0.5826Confidence level(c)=95%α=1-0.95=0.05α2=0.025critical…

Q: A department chair wanted to know whose students performed better on a common pass/fail final exam:…

A: p1 :  proportion of students passed in smith's  class p2 :  proportion of students passed in Jones's…

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 500…

A:

Q: sample of 624 applicants to the Durmstrang Institute of Sorcery, 133 were accepted. Construct a 90%…

A: Given that  X=133 , n=624 , p=20%=0.20

Q: What proportion of your confidence intervals include the true population mean? Is this proportion…

A: Consider a confidence interval of 95%. That is, the proportion that the confidence interval will…

Q: A Pew Internet poll asked 4272 U.S. adults about their use of smart watches and fitness trackers. A…

A: Given,n=4272X=897

Q: According to a survey conducted by Pew Research Center in June 2009, 44% of people aged 18 to 29…

A:

Q: 3. You plan to conduct a survey to find out what proportion of the workforce has two or more jobs.…

A:

Q: Find the point estimate of the percentage of men who have red/green color blindness. b. Find a 90%…

A: Given that sample size n = 80 Number of men who have red/green color blindness, X = 7 At 90%…

Q: According to a poll, 89% of California adults (450 out of 506 surveyed) feel that education is one…

A: Find a 90% confidence interval for the population proportion.

Q: The higher the level of significance is, the lower the level of confidence True False

A: We have to find out startment is true or false...

Q: Suppose that a health expert has claimed that 28% of college students smoke cigarettes. To…

A: Given 95% confidence interval for the percentage of college students who smoke is 19% to 24%. Given…

Q: According to a poll, 77% of California adults (389 out of 506 surveyed) feel that education is one…

A: Given that the number of favorable cases Favorable Cases XX = 389389 Sample Size NN = 506506…

Q: It is believed that slightly over 50% of Americans own pets. A 95% confidence interval for the…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: To assess the proportion of the readers of a magazine being professional, a random sample of 1000…

A: Given that the random sample of 1000 readers is selected and 660 are found to be professionals. That…

Q: In general, when you increase the confidence level for a confidence interval using the same sample…

A: As confidence level increases critical value is going to increase .  Here they given sample…

Q: 5. Still unconvinced, you calculate a 95% confidence interval to estimate the percentage of…

A: The objective of this question is to calculate a 95% confidence interval for the percentage of…

Q: 1. Online News In a Harris poll of 2036 adults, 40% said that they prefer to get their news online.…

A: Given that the sample size is n=2036 and sample proportion, p^=0.40. Confidence level=95%…

Q: If we calculate a 95% confidence interval (CI) instead of a 99% confidence interval, then: A. The…

A: Here we need to choose from the correct option. We know that as the level of confidence decreases…

Q: If 64% of a sample of 550 people leaving a shopping mall claims to have spent over $25 create and…

A: Given,   Sample size = 550 Sample proportion = 0.64   Critical value: Using z-table, the z-critical…

Q: A marketing survey involves product recognition in New York and California. Of 558 New Yorkers…

A:

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.