11. a. The manufacturers are interested in estimating the percentage of defective light bulbs coming from a certain process.   They want a 90% confidence interval with a margin of error of 2%.   How many light bulbs must they test? Choices: (a)   50   (b) 500   (c) 800   (d)   2000  (e) 3000 11. b. Same question as in the previous problem, but assume they had a reason to believe the proportion is fairly close to 6%.    How large a sample must they test? Choices: (a)   50   (b) 500   (c) 800   (d)   2000  (e) 3000

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Solution: From the given information, confidence level is 0.80, p=0.18 and E=0.03.

Q: Suppose you are told that a 95% confidence interval for the average price of a gallon of regular…

A: compute the sample mean and the maximal margin of error

Q: Suppose you are told that a 95% confidence interval for the average price of a gallon of regular…

A: Given confidence interval, Lower limit (LL)= 3.13 Upper limit (UL)=4.50

Q: The Centers for Disease Control reported the percentage of people 18 years of age and older who…

A: a) The sample size can be estimated as follows: n=ze2p(1-p)where, z = z scoree = errorp =…

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Answer: From the given data, Estimated population proportion (p) = 0.23 Margin of error (E) = 0.04…

Q: A manufacturer of small appliances purchases plastic handles for coffeepots from an outside vendor.…

A:

Q: compute the sample mean and the maximal margin of error E. (Round your answers to two decimal…

A: It is given that The 95% confidence interval is CI = ( 3.50, 3.84 )

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Population proportion p=0.23 Margin of error =E =0.06

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: Kim wants to determine a 80 percent confidence interval for the true proportion p of high school…

A: Margin of error =0.04

Q: eth wants to determine a 90 percent confidence interval for the true proportion of high school…

A:

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A:

Q: Example: Hemoglobin determinations were made on 16 animals exposed to a harmful chemical. The…

A: Given data is15.6,14.8,14.4,16.6,13.8,14.0,17.3,17.4,18.6,16.2,14.7,15.7,16.4,13.9,14.8,17.5sample…

Q: If you wish to estimate a population mean with a sampling distribution error SE= 0.31 using a 95%…

A: The sample size needed is obtained below as follows : Obtain the area of probability in the right…

Q: What proportion of homes for sale in Ohio are sold through a real estate agency? In a survey of a…

A: The confidence interval is 0.69 to 0.81.

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: p = 0.23E = 0.03Confidence level = 95%

Q: have to be to get a margin of error less than 0.02 for p?

A: confidence level=80% Margin of error(E)=0.02

Q: A company wants to estimate, at a 95% confidence level, the proportion of all families who own its…

A:

Q: . An educator wants to construct a 95% confidence interval for the proportion of elementary school…

A:

Q: 例题3: Based on a survey of a random sample of 900 adults in the United States, a journalist reports…

A:

Q: a, How many of the 3058 subjects used at least one prescription medication? 2688 (Round to the…

A:

Q: handles from the shipment should be inspected to estimate p to within 0.07 with 95% confidence?…

A: It is given that  Margin of error, E = 0.07 Confidence level = 95%

Q: #6. For the next poll of the president's approval rating, we want to get a margin of error of 1%…

A:

Q: An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars…

A:

Q: Kim wants to determine a 95 percent confidence interval for the true proportion p of high school…

A: Margin of error =E =0.03

Q: A survey asked, "How important is it to you to buy products that are made in America?" of the 600…

A: Given:                              Number of favorable cases (x) = 150…

Q: A researcher from a national reading program conducted a poll of 650 American adults over the age of…

A: Mean()=13.5Margin of error(E)=1.25sample size(n)=650confidence level=95%

Q: 1. Construct a 95% confidence interval to estimate the proportion of Wingate male students that are…

A: total number of male students =126 number of students who are left handed=17

Q: The ACME computer company wanted to estimate the proportion of defective computers that are produced…

A: a) The interval (.024, .066) is the confidence interval for proportion of defectives. Thus the…

Q: I A rescarcher wants to eatimate the average number of children with neart discase who are between…

A: Note: Please repost remaining sub-parts as I can author only 1 question as per my policy

Q: A sociologist wants to construct a 95% confidence interval for the proportion of children aged 8-12…

A: We have to find confidence interval limits...

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: It is given that margin of error (E) is 0.02 and the confidence level is 0.90.

Q: se you are told that a 95% confidence interval for the average price of a gallon of regular gasoline…

A: Given: Lower limit = 2.83 Upper limit = 3.86 The point estimate can be calculated as: Point estimate…

Q: A food safety guideline is that the mercury in fish should be below 1 part per million (ppm). Listed…

A: Given, Sample size = 7   Since the population standard deviation is not known, use t-distribution to…

Q: Beth wants to determine a 99 percent confidence interval for the true proportion p of high school…

A:

Q: If you wish to estimate a population mean with a sampling distribution error SE= 0.34 using a 95%…

A: From the provided information, Sampling error (SE) = 0.34 Confidence level = 95% Population variance…

Q: Dylan wants to determine a 99 percent confidence interval for the true proportion p of high school…

A:

Q: The 2008 General Social Survey asked, “What do you think is the ideal number of children for a…

A:

Q: Suppose you are told that a 95% confidence interval for the average price of a gallon of regular…

A: Here we need to find the sample mean and margin of error from the given 95% confidence interval.

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: From the provided information,Confidence level = 90%

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: population proportion(p)=0.15confidence level=85%Margin of error(E)=0.03

Q: Dylan wants to determine a 99 percent confidence interval for the true proportion p of high school…

A:

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Given,   Margin error = 0.02 Population proportion = 0.16   The objective is to find the sample…

Q: Suppose you are told that a 95% confidence interval for the average price of a gallon of regular…

A:

Q: Suppose the Statistics Department at TAMU wants to create a confidence interval for the proportion…

A:

Q: Kim wants to determine a 90 percent confidence interval for the true proportion p of high school…

A: Margin of error =E =0.02

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

A: Given,Margin of error, E = 0.04Confidence level, C = 99% = 0.99

Q: Kim wants to determine a 95 percent confidence interval for the true proportion p of high school…

A: The question is about sample size estimation Given : Confidence level = 0.95 Prop. of students…