An insurance company collects data on​ seat-belt use among drivers in a country. Of 1200drivers 20-29years​ old,31​% said that they buckle​ up, whereas 385 of 1300 drivers 45-64 years old said that they did. Find a 99​% confidence interval for the difference between the proportions of​ seat-belt users for drivers in the age groups 20-29 years and 45-64 years.       Question content area bottom Part 1 Construct a 99​% confidence interval.   The 99​% confidence interval for p1−p2 is from enter your response here to enter your response here. ​(Round to three decimal places as​ needed.)

Q: Isabel Myers was a pioneer in the study of personality types. According to one of her surveys, in a…

A: Solution

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A: Point estimate=0.81

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A: Given claim: 50% of the parents who had children in grades K-12 were satisfied with the quality of…

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Q: survey​ asked, "How many tattoos do you currently have on your​ body?" Of the 1241 males​ surveyed,…

A: We have given that,n1=1241,x1=186,n2=1093,x2=129

Q: What confidence interval will have the larger margin of error when using the same sample data and…

A: Since we know that, Confidence interval = the estimate ± the margin of error Margin of error is…

Q: Suppose we take a survey of 200 students and ask how much they study per week. The result is an…

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Q: Several years ago, 33% of parents who had children in grades K-12 were satisfied with the quality of…

A: The formula for the confidence interval for the proportion is, Here, confidence level is 0.90. Use…

Q: It is known that ticks in York County carry the Lyme disease.  In a representative sample of 200…

A: Let n=sample size, X=number of Carry disease. p^=x/n  X=167, n=200

Q: Suppose I wanted to know the proportion of students who are paying attention in class, so I give a…

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Q: cording to a report in USAToday, more and more parents are helping ndom sample of 40 young adults…

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Q: Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent" The…

A:

Q: A telephone poll of 1,000 adult Americans was reported in an issue of a news magazine. One of the…

A: A telephone poll of 1,000 adult Americans was reported in an issue of a news magazine. One of the…

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: A &B

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Q: What formulas are used to find the confidence interval? Researchers comparing the effectiveness of…

A: According to the given information in this questionWe need to construct 95% confidence interval

Q: Several years ago, 43% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given  Several years ago, 43% of parents who had children in grades K-12 were satisfied with the…

Q: 5-Seventy percent of 50 randomly selected students from college of science and engineering were…

A:

Q: A bag of M&Ms was randomly selected from the grocery store shelf, and the color counts were: Brown…

A: It is given that  Brown = 25,     Orange = 14 Red = 21,           Green = 15Yellow = 19,       Blue…

Q: Several years ago, 44% of parents who had children in grades K-12 were satisfied with the quality of…

A: We have given that 44% of parents who had children in grades K-12 were satisfied with the quality of…

Q: 7 out of 70 students said they were comfortable with “working in a workplace with a lot of…

A: Given that  57 out of 70 students said they were comfortable with “working in a workplace with a lot…

Q: A high school counselor is interested in determining factors that contribute to high school drop out…

A: Solution; Given information: n1=41 Sample size of high school  graduatesn2= 38 Sample size of high…

Q: What does the 95% represent in a 95% confidence interval

A: Solution CI=95%

Q: What are two ways to get a narrower confidence interval for a proportion?

A: Two ways to get a narrower confidence interval for a proportion are:

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: What Z score would be used to construct a 90% confidence level? Is it ... a. 1.65 b. 2.33 c.…

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Q: Several years​ ago, 42​% of parents who had children in grades​ K-12 were satisfied with the quality…

A: Let p be the population proportion of parents satisfied with the quality of education the students…

Q: Several years ago, 43% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: Several years ago, 46% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given  p=0.46, n=1055, X=488

Q: several years ago, 48% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given that  Sample size n =1035 Favorable cases x =497 Sample proportion p^=x/n  =497/1035 =0.4802