A survey of 240 individuals found that 1/3 of them use their cell phones primarily for e-mail. Construct a 95% interval estimate of the population proportion. Can you conclude, at 95% confidence, that the population proportion is less than 0.4?

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Given,population proportion(p)=0.1margin of error (E)=0.025α=1-0.95=0.05α2=0.025Z0.025=1.96

Q: 2. Given: n=80, a = 15, level of confidence is 92%. What is the margin of error of the given data?

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

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Q: p∗=43%p∗=43%. You would like to be 95% confident that your esimate is within 2.5% of the true…

A: Given, p=430%=0.43 Confidence interval= 95%=0.95 Margin of error (E)= 2.5% =0.025

Q: ou want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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Q: B. DEGREE OF CONFIDENCE AND MARGIN OF ERROR 1. Find the margin of eTor if the confidence…

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

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Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Introduction: The confidence interval for the population proportion, p at the 100 (1 – α) %…

Q: There are many reasons adults use credit cards. A recent survey found that 66% of adults used credit…

A: 66% of adults use credit cards for convenience.Confidence level is 99% i.e., 0.99.Margin of error is…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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Q: you want to obtain a sample to estimate a population proportion. based on previous evidence, you…

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Q: Suppose you select a simple random sample of 75 Douglas College students, and you find that 8 are…

A: The point estimate of the population proportion is the sample proportion. Given that, 8 out of the…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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Q: A rare birth defect occurs in approximately 0.5% of all cases in males. If we sample all the males…

A: Given information: The total number of males born in 2016 in a specific region is N = 200,000. It is…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Given data, p=30%=0.30 E=0.1%=0.001 z value at 99.5% confidence is Zc=2.807 n=?

Q: A random sample of medical files is used to estimate the proportion p of all people who have blood…

A: Margin of error(E), E=z×p×qn From the above E, find n, n=zE2×p×q Here, E=0.04 There is no…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Obtain the sample size of a preliminary estimate for p is 0.90.   The formula of sample size is,…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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

Q: A researcher wishes to estimate the number of households with two computers. How large a sample is…

A: given data   CI = 0.90, P ( - Z< P < Z ) = 0.90 therefore z = 1.645 ( =z table ) E = 6% =…

Q: Confidence in the Military In June 2012, a Gallup poll reported that 1503 out of a total of 2004…

A: Confidence in the Military In June 2012, a Gallup poll reported that 1503 out of a total of 2004…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Given P=24%= 0.24 than q= 1-p =0.76 Confidence =99.9 % Estimate = 5%= 0.05  We have to calculate n

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Answer:-  Given, P=0.76 q=1-p=1-0.76=0.24 Confidence level=99% Critical Z value =2.5758 Margin of…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Givenpopulation proportion(p)=0.74Margin of error(E)=0.05confidnence interval…

Q: You want to estimate the percentage of small incorporated businesses that are owned by women. A…

A: The random variable percentage of small incorporated businesses follows binomial distribution. The…

Q: You would like to estimate the proportion of all residents in favor of a new law with 98%…

A: The sample proportion is 0.30, margin of error is 0.06, and the confidence level is 98%. Computation…

Q: A random sample of medical files is used to estimate the proportion p of all pe who have blood type…

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Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Solution: From the given information, confidence level is 0.90, p=0.59 and E=0.03.

Q: Suppose a random sample of n= 320 teenagers 13 to 17 years of age was asked if they use social…

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Q: In each of Exercises, explain the effect on the margin of error and hence the effect on the accuracy…

A: Formula for the margin of error is given by

Q: A survey was taken of the heights, in inches, of 20- to 29-year-old males. A simple random sample of…

A: Given info: A survey was taken at the heights in inches of 20-29 year old males. A simple random…

Q: Before the furniture store began its ad campaign, it averaged 213 customers per day. The manager is…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

Q: For a sample of n=16 scores, how many scores are used to calculate the sample variance?

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Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: The calculation for the size of the population can be done using the finite population or infinite…

Q: (a) Find a point estimate for the proportion of cell phone owners aged 18-24 who have an Androld…

A: It is given that Sample size n = 245 Number of cell phone owners with Android phone, X = 106

Q: State the equation for the 95% confidence interval?

A: The equation for confidence interval can be stated as: Here x̅ is the sample mean, Zα/2 is the…

Q: you want to obtain a sample to estimate a population proportion. based on previous evidence, you…

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Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Thus, it is given that the confidence level is 95%. Therefore, the significance level, α = 0.05.From…

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

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Q: womence level. Use E=1%. 2) In a survey of 700 random households in a particular city in NCR, adults…

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.