An insurance company checks police records on 557 accidents selected at random and notes that teenagers were at the wheel in89 of them. Complete parts a) through d).a) Construct the 95% confidence interval for the percentage of all auto accidents that involve teenage drivers.95% CI = (% %)(Round to one decimal place as needed.)

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Answered: an insurance company checks police…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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In a survey of 2275 adults, 709 say they believe in UFOS. Construct a 90% confidence interval for the population proportion of adults who believe in UFOS. A 90% confidence interval for the population proportion is ( ). (Round to three decimal places as needed.)
A poll found that82%of a random sample of 1093adults said that they believe in ghosts. a. Determine the margin of error for a 99% confidence interval. E=
n a survey of 3422 adults aged 57 through 85 years, it was found that 82.7% of them used at least one prescription medication. Complete parts (a) through (c) below. a. How many of the 3422 subjects used at least one prescription medication? nothing (Round to the nearest integer as needed.) b. Construct a 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication. nothing%less thanpless than nothing% (Round to one decimal place as needed.)
In a survey of 3341 adults aged 57 through 85 years, it was found that 88.1% of them used at least one prescription medication. Complete parts (a) through (c) below. a)a. How many of the 3341 subjects used at least one prescription medication? nothing (Round to the nearest integer as needed.) b) Construct a 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication. (Round to the nearest integer as needed.) c)What do the results tell us about the proportion of college students who use at least one prescription medication?
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A research center survey of 2,490 adults found that 1,902 had bought something online. Of these online shoppers, 1,237 are weekly online shoppers. a.) Construct a 95% confidence interval estimate of the population proportion of adults who had bought something online. b.) Construct a 95% confidence interval estimate of the population proportion of online shoppers who are weekly online shoppers.
q42
In a survey of 3242 adults aged 57 through 85 years, it was found that 82.9% of them used at least one prescription medication. Complete parts (a) through (c) below. a. How many of the 3242 subjects used at least one prescription medication? ____ (Round to the nearest integer as needed.) b. Construct a 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication. ____%<p<____% (Round to one decimal place as needed.) c. What do the results tell us about the proportion of college students who use at least one prescription medication? A. The results tell us that there is a 90% probability that the true proportion of college students who use at least one prescription medication is in the interval found in part (b). B. The results tell us that, with 90% confidence, the probability that a college student uses at least one prescription medication is in the interval found in part (b).…
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly survey 399 drivers and find that 285 claim to always buckle up. Construct a 83% confidence interval for the population proportion that claim to always buckle up. Use interval notation, for example, [1,5]
You are interested in constructing a 99% confidence interval for the proportion of all caterpillars that eventually become butterflies. Of the 431 randomly selected caterpillars observed, 50 lived to become butterflies. Round answers to 4 decimal places where possible. a. With 99% confidence the proportion of all caterpillars that lived to become a butterfly is between___ and___ . b. If many groups of 431 randomly selected caterpillars were observed, then a different confidence interval would be produced from each group. About____ percent of these confidence intervals will contain the true population proportion of caterpillars that become butterflies and about ____ percent will not contain the true population proportion.
A local radio randomly selects 500 of its listeners. Listeners are offered to enter a competition where the price is a concert ticket. Among these 500 subscribers, 240 accept the promotional offer. The interval (45.76%, 50.23%) is a 95%-confidence interval for what quantity? a. the percentage of listeners in the sample who would accept the invitation to enter the competition b. the percentage of all listeners who would accept the invitation to enter the competition
In a survey of 3,541 adults concerning complaints about restaurants, 1,494 complained about dirty or ill-equipped bathrooms and 1,209 complained about loud or distracting diners at other tables. Complete parts (a) through (c) below. a. Construct a 90% confidence interval estimate of the population proportion of adults who complained about dirty or ill-equipped bathrooms. (Round to four decimal places as needed.)

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