13. What is the minimum sample size needed to estimate a population mean within 1 inch at the 98% confidence level, if it is known that the population standard devjation is 3.5 Inches? *

Q: A company wants to estimate the mean number of hours per week adults use computers at home. What is…

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Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 6. How many…

A: Formula for the sample size needed to estimate a population mean is

Q: determine the (a) finite sample size and (b) infinite sample size for a 5000 population, use…

A: We have given that  Population proportion p= 0.12 Margin of error =E = 0.02

Q: Assume that all​ grade-point averages are to be standardized on a scale between 0 and 6. How many​…

A: The population standard deviation is σ = 1.5 The margin of Error, E = 0.007 Given 95% confidence…

Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 5. How many…

A: Solution: From the given information, confidence level is 0.95, σ=1.25 and E=0.009.

Q: 10 A local health care facility would like to estimate the proportion of patients referred to them…

A: 10. Given information, the margin of error is 0.15. Confidence level is 99%. Significance level is…

Q: Calculate the minimum sample size required in order to make a 95% confidence interval for a…

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Q: What is the smallest sample size that guarantees that the margin of error is less than 6 when…

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Q: Suppose that the amount of time spend by working student weekly is normally distributed with the…

A: Given,   Sample size = 120 Sample mean = 150 Population standard deviation = 25   Since the…

Q: Find the sample size required to develop an 86% confidence interval on a population proportion that…

A: Given information’s areConfidence interval = 86%Margin error = 5.5%Margin error = 0.055Proportion…

Q: Assume that all​ grade-point averages are to be standardized on a scale between 0 and 4. How many​…

A: Solution : Given : e = 0.013            σ = 1 confidence level = 0.98 Therefore z-score…

Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 4. How many…

A: Computation of critical value: 1-α=0.98α=0.02α2=0.011-α2=0.99 The critical value of z-distribution…

Q: 2. The width of a confidence interval estimate for a population mean when the population standard…

A: The confidence interval estimate for a population mean when population standard deviation σ is,…

Q: Assume that all grade point averages are to be standardized on a scale between 0 and 4. How many…

A: Population standard deviation,σ = 1. Margin of error , E =  0.01. Confidence level , c = 98%  ( in…

Q: What is the minimum sample size needed to construct a 95% confidence interval of the population…

A: Solution: From the given information, confidence level is 0.95 and E=0.05.

Q: If the mean= 85 and standard deviation =8 and n=64(sample size) construct a 95% confidence interval…

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Q: We heard that there was a 90% confidence interval for the population mean from 22.5 to 28.3,…

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Q: 12- When it is accepted that the time between the production date of the aspirin and the expiration…

A: Obtain the sample size. The sample size is obtained below as follows:   The formula of sample size…

Q: Find 95% confidence interval for the population mean, if the sample size is 40, the sample mean is…

A:

Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 5. How many…

A: From the provided information, Population standard deviation (σ) = 1.25 Confidence level = 99%…

Q: 1. Use Simple Random Sampling to generate a sample of sixteen (16) students from your class and…

A: Disclaimer : “Since you have posted a question with multiple sub-parts, we will solve first three…

Q: 7)A firm would like to estimate the mean age of all people in the civilian labor force. How large a…

A: Solution: Given information: Margin of Error = E= 3 years Population standard deviation=σ= 22.19…

Q: 3.To obtain an estimate of the proportion of 'full time' university students who have a part time…

A: Given that:Variance=σ2=4standard deviation=σ=4=2E=margin of error=0.1z=critical value for 95%…

Q: What sample size is needed to estimate a population mean within +60 of the true mean value using a…

A: Introduction: The 100 (1 – α) % confidence interval for the population mean, μ, when the population…

Q: For a test market find the sample size needed to estimate the true proportions if consumers…

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

Q: An auditor, examining a total of 820 accounts receivable of a corporation, took a random sample of…

A: According to the guidelines only three parts will be answered. Please upload others separately. (a)…

Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 6. How many…

A: Obtain the critical value: The given confidence level 100*(1–α)% = 95%. The critical value is…

Q: A company wants to estimate the mean number of hours per week adults use computers at home. What is…

A: From the provided information, Population standard deviation (σ) = 1 Confidence level = 95% Margin…

Q: Suppose a sample of 25 students with a sample mean IQ of 127. The population standard deviation was…

A: As per our guidelines, we are allowed to answer first question only. Thanks   The following…

Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 5. How many…

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Q: 26 randomly selected students took the calculas final. If the sample mean was 90. Construct a 95$…

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Q: Assume that all​ grade-point averages are to be standardized on a scale between 0 and 4. How many​…

A: Population standard deviation, sigma is 1. The z-critical value for 98% confidence interval is 2.33.…

Q: Assume that all​ grade-point averages are to be standardized on a scale between 0 and 4. How many​…

A: It is given that confidence level is 0.98, population standard deviation is 1 and margin of error E…

Q: Assume that all​ grade-point averages are to be standardized on a scale between 0 and   4. How…

A:

Q: Determine the finite and infinite sample size for a 5000 population. use percentage population of…

A: We have given that  Margin of error =E = 0.02 Population proportion p = 12%= 0.12   Level of…

Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 6. Hov many…

A: Given that  Margin of error=E=0.005  ?=1.5 98% confidence level

Q: .Find 95% confidence interval for the population mean, if the sample size is 64, the sample mean is…

A: It is given that Sample size n = 64 Sample mean M = 508 Sample SD s = 28 The critical value of t at…

Q: What sample size is needed to estimate a population mean within 70 of the true mean value using a…

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Q: Suppose that the distribution of height of female students in University is normally distributed…

A: Since you posted a question with multiple subparts, we will solve first three subparts for you. To…

Q: Suppose a sample of 25 students with a sample mean IQ of 127. The population standard deviation was…

A:

Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 4. How many…

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Q: The Green party of Canada is planning on conducting a survey to estimate the proportion of Canadians…

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Q: A bank wishes to estimate the mean balances owed by customers holding MasterCard. The population…

A: Determine the sample size n needed.   Obtain the critical value of z at the 98% confidence level.…

Q: 1. A decision maker is interested in estimating a population proportion. A sample of size n = 150…

A: Given data,n=150x=115p=xn=115150=0.77z-value at 90% confidence is Zc=1.645

Q: Assume that a sample is used to estimate a population proportion p. Find the 99.5% confidence…

A: Solution: From the given information, p=0.85, n=201 and the confidence level is 0.995.

Q: What is the approximate sample size required to estimate the percentage of Americans who have earned…

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

Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 6. How many…

A:

Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 6. How many…

A: From the given information, Consider,  Confidence level = 0.99 σ=1.5 Thus,

Q: Assume that all​ grade-point averages are to be standardized on a scale between 0 and 6. How many​…

A:

Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 6. How many…

A: Case(i) When Z = 2.576        (ii) when Z = 2.58