An insurance company is interested in conducting a study to to estimate the population proportion of teenagers who obtain a driving permit within 1 year of their 16th birthday. A level of confidence of 99% will be used and an error of no more than .04 is desired. There is no knowledge as to what the population proportion will be. The size of sample should be at least _______. 1037 41 259 160 289

Q: 2) Assume the p=.03 (3%). How large a sample is needed to estimate the proportion of breast cancer…

A:

Q: A lobbyist is trying to estimate the true proportion of US adults that support an upcoming bill.…

A: Givenapproximation of p = 0.5Margin of error(E)=0.01confidence level = 95%

Q: Determine the sample size required to estimate a population proportion to within The numbers 0.032…

A: The margin of error is 0.032, confidence interval is 95%.

Q: this probiem, carry at least lour digits alteer the decimal in your calculadons. Answers may vary…

A: It is given that margin of error (E) is 0.03 and the confidence level is 0.80.

Q: A recent study indicated that 20% of 133 women over age 55 in the study were widows.  a. How large a…

A:

Q: How large a sample should you take to be 95% confident that the estimate of the true mean number of…

A:

Q: An engineer wishes to determine the width of a particular electronic component. If she knows that…

A: From the provided information, Population standard deviation (σ) = 2.9 Confidence level = 90% Margin…

Q: people were asked what their lowest test score of the last semester was.  Data Set: 97, 88, 56, 64,…

A: Solution

Q: A study quoted in The Windsor Star suggested that mathematics should be taught in the afternoon…

A: We have given that,  Confidence interval = 95 % and margin of error (B) = 0.06 Then,  We will find…

Q: Assume that the population proportion is .55. Compute the standard error of the proportion, sp, for…

A:

Q: the population standard deviation have to be in order for the standard error to be 1? 2 ? 5 ? 100

A: It is given that  Sample size, n = 36

Q: E. How large a sample is needed if we want to be 95% co- mean life span of the batteries is not off…

A: Life span of batteries are normally distributed with mean 15 and standard deviation is 2…

Q: How many people must be surveyed if we want to estimate the percentage of students weigh more than…

A: Given: The margin of error = 3%=0.03 Confidence level = 98% Since the proportion is students is not…

Q: An engineer wishes to determine the width of a particular electronic component. If she knows that…

A:

Q: Suppose that you are attempting to estimate the weight of 600 parts. In order to use the infinite…

A:

Q: When estimating the mean age of a population of 5000 individuals, a simple random sample of 50…

A:

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 17 for the population…

A: Givenstandard deviaion(σ)=17Margin of error(E)=4confidence level =…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population…

A: We want to find the sample size (n)

Q: If you want to be 95% confident of estimating the population proportion to within sampling error of…

A:

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Given data How hard is it to reach a business person by phone? and given  let p be the proportion of…

Q: find the sample size needed to give , with 99% confidence, a margin of error within equal to 6% when…

A: Assume sample proportion(p^)=0.51-p^=1-0.5=0.5α=1-0.99=0.01α2=0.005Z0.005=2.58       (from Z-table)

Q: With 95% confidence, what is the margin of error when estimating a population mean when n = 100 and…

A:

Q: Suppose a certain Statistics instructor wants to estimate the proportion of students who enjoy…

A: since estimate for proportion is not known therefor we take p⏞=0.5 margin of error=E= 0.03 level of…

Q: An engineer wishes to determine the width of a particular electronic component. If she knows that…

A: Given that: Margin of Error E=0.1Standard deviation σ=3.5α=0.01 Now, the sample size required is:…

Q: Question Help A programmer plans to develop a new software system. In planning for the operating…

A:

Q: What sample size is needed to give a margin of error within ±0.6 in estimating a population mean…

A: Given that, Critical values: Using the z-table, the critical value at 99% confidence level is

Q: earcher wants to determine the proportion of elm trees in Windsor, Ontario, dying of Dutch elm…

A:

Q: A population proportion is to be estimated. Estimate the minimum sample size needed to achieve a…

A: From the provided information, Margin of error (E) = 0.02 Confidence level = 95%

Q: An engineer wishes to determine the width of a particular electronic component. If she knows that…

A: From the provided information, Population standard deviation (σ) = 3.6 mm Confidence level = 90%…

Q: The claim is that weights (grams) of pennies made after 1983 have a mean equal to 2.500 g as…

A:

Q: A grocer finds that the cantaloupes in his store have weights with mean 0.7 kg and standard…

A: Given, Mean weight of cantaloupes is 700 gm. Standard deviation is 53 gm

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 16 for the population…

A:

Q: An engineer wishes to determine the width of a particular electronic component. If she knows that…

A: Since population standard deviation is known, use z-distribution. Find z-critical value. Given:…

Q: estimate the population proportion p,what is the minimum sample size we need in order to achieve a…

A: Solution: From the given information, confidence level is 0.95, p=0.1 and E=0.01.

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A:

Q: How large a sample is needed in Exercise 9.2 if we wish to be 96% confident that our sample mean…

A: The standard deviation is 40 hours and the margin of error (E) is 10.

Q: This is a right-tailed test so the P-value should be 0.9370.     This is a two-tailed test so the…

A: Given : claim : p = 0.5  z = 1.53

Q: Find the Margin of Error, if we are asked for 90% confidence interval where the mean is 52.3, the…

A: The provided information are: Confidence level = 90% Population standard deviation (σ)=2.15 Sample…

Q: In order to set rates, an insurance company is trying to estimate the number of sick days that full…

A: Given Population standard deviation=2.4 days Margin of error (E) =1 days

Q: A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many…

A:

Q: A survey of the opinions of property owners about a street widening project was taken to determine…

A: The following information has been provided: Observed Frequencies:   Opinion…