A researcher wishes to estimate, with 90% confidence, the population proportion of adults who eat fast food four to six times per week. Her estimate must be accurate within 1% of the population proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 46% of the respondents said they eat fast food four to six times per weck. (c) Compare the results from parts (a) and (b).

Q: Find the sample​ size, n, needed to estimate the percentage of adults who have consulted fortune…

A:

Q: You wish to estimate, with 99% confidence, the proportion of all US adults who want more funding for…

A: Given data, E=4%=0.04 z-value at 99% confidence is Zc=2.576

Q: A researcher wishes to estimate, with 95% confidence, the population proportion of families who eat…

A: Answer: From the given data, 95% confidence interval, Margin of error (ME) =3% =0.03 P^= 16% = 0.16…

Q: A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of motor vehicle…

A: Here we need to find the sample size required in both the cases and compare the two results.

Q: 4% of the true proportion. A researcher wishes to estimate, with 90% confidence, the population…

A:

Q: What does brand loyalty mean to consumers? According to a recent research report, 39% of consumers…

A: Probability that a consumer associate trust with brand loyalty is; p = 39% = 0.39 (a) Given the…

Q: You wish to estimate, with a 99% confidence, the population proportion (p) of U.S adults who made…

A: Given: Margin of error (E)=0.042Confidence level (c)=0.99α=1-c   =1-0.99    =0.01Area=1-α2…

Q: Suppose a certain Statistics instructor wants to estimate the proportion of students that cheat on…

A: From the provided information,Confidence level = 95%Margin of error (E) = 0.02When no prior estimate…

Q: A researcher wishes to estimate, with 95% confidence, the population proportion of motor vehicle…

A:

Q: A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of motor vehicle…

A:

Q: Use the given data to find the minimum sample size required to estimate the population proportion.…

A: Given Information: Margin of​ error: 0.03​ confidence​ level: 99% p is estimated by 0.13

Q: The pulse rates of 163 randomly selected adult males vary from a low of 39 bpm to a high of 107 bpm.…

A:

Q: A researcher wishes to estimate, with 90% confidence, the population proportion of motor vehicle…

A: The question is about sample size estimation Given : Confidence level = 0.90 Estimate is within 4 %…

Q: A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of adults who…

A:

Q: A researcher wishes to estimate, with 95% confidence, the population proportion of motor vehicle…

A: Given Data : Margin of error: ME = 0.03 confidence level: c= 0.95…

Q: A researcher wishes to estimate, with 95% confidence, the population proportion of motor vehicle…

A: The formula for sample size is :n=Zc2p(1-p)E2 Given : E = 2%=0.02 Confidence level = 95% Zc=1.96

Q: A researcher wishes to​ estimate, with 99​% ​confidence, the population proportion of motor vehicle…

A: The independent variable is motor vehicle fatalities that were caused by​alcohol-impaired driving.…

Q: A researcher wishes to estimate, with 90% confidence, the population proportion of motor vehicle…

A: Area on each tail for two-tail tests. Refer Standard normal table/Z-table OR use excel function…

Q: The pulse rates of 157 randomly selected adult males vary from a low of 44 bpm to a high of 112 bpm.…

A: Given that: Pulse rates of 157 adult males vary from 44 bpm to 112 bpm. Sample mean 'm' lies between…

Q: You have a population of 100 engineering students at a certain university and you want to interview…

A: Assume, n be the minimum sample size required. N be the population. p^ be the sample proportion of…

Q: Use the given data to find the minimum sample size required to estimate a population proportion or…

A: The random variable X follows normal distribution. The value of the margin of error is 0.04. The…

Q: Use the given data to find the minimum sample size required to estimate the population proportion…

A:

Q: In a study of government financial aid for college students, it becomes necessary to estimate the…

A:

Q: The pulse rates of 173 randomly selected adult males vary from a low of 42 bpm to a high of 114 bpm.…

A: (a) Obtain the value of the sample size using the range rule of thumb to estimate sigma. The value…

Q: Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years…

A: p = 0.5 Margin of error = 0.01

Q: The pulse rates of 153 randomly selected adult males vary from a low of 37 bpm to a high of 101 bpm.…

A: Given that  Randomly selected males (n) = 153  The pulse rates vary from  Low = 37 bpm High = 101…

Q: A researcher wishes to​ estimate, with 80​% ​confidence, the population proportion of adults who…

A: The confidence level is 80%, and margin of error is 2%. There is no preliminary estimate.

Q: A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of motor vehicle…

A: Given,margin of error(E)=0.03α=1-0.95=0.05α2 =0.025z0.025 =1.96

Q: A researcher wishes to estimate, with 92% confidence, the population proportion of families who eat…

A: Population proportion p=18%=0.18 Margin of error =E =0.07

Q: (a) No preliminary estimate is available. Find the minimum sample size needed. ​(b) Find the minimum…

A:

Q: Sample size. A pollster wishes to estimate,with 95% confidence, the proportion of people who believe…

A: It is given that margin of error (E) is 0.03 and the confidence level is 95%.

Q: In each of Exercises, we have given a likely range for the observed value of a sample proportion p.…

A:

Q: (a) What is the minimum sample size needed assuming that no prior information is available? n =…

A:

Q: A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What…

A:

Q: C. Find the sample size for each of the following: 1. 90% confidence, E = 0.005, p = 0.25 2. 95%…

A: as per our company guidelines we are able to answer only first 3 sub-parts. Kindly repost other…

Q: The pulse rates of 159 randomly selected adult males vary from a low of 38 bpm to a high of 106 bpm.…

A: GivenConfidence Interval(c)=90%Margin of error(E)=3pulse rates vary from 38 bpm to high 106bpm

Q: A researcher wishes to estimate, with 99% confidence, the population proportion of families who eat…

A: Population proportion p=16%=0.16 Margin of error =E =5%=0.05

Q: a) What is the minimum sample size needed assuming that no prior information is available? O (Round…

A: When nothing is given assume p = 0.5

Q: The pulse rates of 154 randomly selected adult males vary from a low of 44 bpm to a high of 112 bpm.…

A: Standard Deviation = σ = (max-min)/4 = (112-44)/4 = 17 Margin of Error = E = 4 Confidence Level…

Q: A researcher wishes to​ estimate, with 99​% confidence, the population proportion of motor vehicle…

A: (a) Obtain the sample size of a no preliminary estimate for p. The formula of sample size is,   Use…

Q: The average worker at a local brake manufacturer produces 10 brakes per day (other statistical…

A: The average worker at a local brake manufacturer produces 10 brakes per day.