A researcher wishes to estimate, with 95% confidence, the population proportion of adults who eat fast food four tosix times per week. Her estimate must be accurate within 2% 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 36% of the respondents said they eatFast food four to six times per week.(c) Compare the results from parts (a) and (b).(a) What is the minimum sample size needed assuming that no prior information is available?(Round up to the nearest whole number as needed.)7=

Given Confidence level=95% E=0.02 At 95% confidence level

Answered: les to es per week. Her estimate must…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A researcher wishes to estimate, with 95% confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). Her estimate must be accurate within 4% of the true proportion. Find the minimum sample size needed, using a prior study that found that 78% of the respondents said they support labeling legislation for GMOs.
A researcher wishes to estimate, with 90% confidence, the population proportion of likely U.S. voters who think Congress is doing a good or excellent job. Her estimate must be accurate within 1% of the true 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 18% of the respondents said they think Congress is doing a good or excellent job. (c) Compare the results from parts (a) and (b).
A researcher wishes to estimate, with 90% confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within 22% of the true 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 42%of the respondents said they think Congress is doing a good or excellent job. (c) Compare the results from parts (a) and (b).
A researcher wishes to estimate, with 90% confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). Her estimate must be accurate within 3% of the true 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 83% of the respondents said they support labeling legislation for GMOs. (c) Compare the results from parts (a) and (b).
A researcher wishes to estimate, with 95% confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within 4% of the true 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 22% of the respondents said they think Congress is doing a good or excellent job.
A researcher wishes to estimate, with 95% confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). Her estimate must be accurate within 3% of the true 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 75% of the respondents said they support labeling legislation for GMOs. (c) Compare the results from parts (a) and (b)
A researcher wishes to estimate, with 90%confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within 4% of the true 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 44% of the respondents said they think Congress is doing a good or excellent job. (c) Compare the results from parts (a) and (b).
A researcher wishes to estimate, with 90% confidence, the population proportion of motor vehicle fatalities that were caused by alcohol-impaired driving. His estimate must be accurate within 4% 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 34% of motor vehicle fatalities that were caused by alcohol-impaired driving. (c) Compare the results from parts (a) and (b).
A researcher wishes to estimate, with 90% confidence, the population proportion of motor vehicle fatalities that were caused by alcohol-impaired driving. His estimate must be accurate within 4% 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 38% of motor vehicle fatalities that were caused by alcohol-impaired driving. (c) Compare the results from parts (a) and (b).
B. The best predicted circumference for a diameter of 1.9 cm is___cm. C. How does the result compare to the actual circumference? Since1.9 cm is within the scope of the sample diameters, the predicted value yields the actual circumference. Even though 1.9 cm is within the scope of the sample diameters, the predicted value yields a very different circumference. Since1.9 cm is beyond the scope of the sample diameters, the predicted value yields a very different circumference. Even though 1.9 cm is beyond the scope of the sample diameters, the predicted value yields the actual circumference.
According to the Pew Research Center,on the propotion of the American population who use only a cellular telephone (landline) is 0.37. Jason conducts a survey of one hundred fifty 20 to 24 year olds who live on their own and finds that 73 do not have a landline to their home. Does this provide sufficient evidence to conclude that the proportion of 20 to 24 year olds who live on their own and don't have a landline is greater than 0.37? Use a=0.10 level of significance. A) Verify that nP0(1-P0)>10 and n< 0.05N (Assume the population sizes is N=40 million) B) State the appropiate null and alternative hypotheses. C) Indicate whether the hypothesis is left, right, or two- tailed.
According to the Pew Research Center,on the propotion of the American population who use only a cellular telephone (landline) is 0.37. Jason conducts a survey of one hundred fifty 20 to 24 year olds who live on their own and finds that 73 do not have a landline to their home. Does this provide sufficient evidence to conclude that the proportion of 20 to 24 year olds who live on their own and don't have a landline is greater than 0.37? Use a=0.10 level of significance. D) Compute the test statistic z0. Round to the nearest hundredth. E) Draw a normal model with the area that represents the P-value shaded. F) Determine and interpret the P-value. What is the conclusion of the hypothesis test?

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