A Polling agency wants to determine the percentage of waters in favour of extending tax cuts. they wish to estimate the percent 2%with 95%confidence.how many individuals should be included in the sample.

Q: Is the sample median always equal to one of the values in the sample? If so, explain why. If not,…

A: Median: The median defines that the middle number of the data. The median is calculated as follows:…

Q: The median has a sampling distribution. Explain why or why not?

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Q: An entertainment company surveyed 360 elementary school children and found that 153 of them were…

A: There are 153 out of 360 (n) elementary school children found as above grade level readers. The…

Q: In a large data set, the 49th percentile is 523 and the 71st percentile is 675.  About what…

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Q: A recent survey by the U.S. Census Bureau determined that the median monthly housing rent was $643.…

A: W heaven to find asked percentage from given data.

Q: Out of 600 people sampled, 120 said they prefer Coke over Pepsi. What is the point estimate for the…

A: From the provided information, Sample size (n) = 600 120 said they prefer Coke over Pepsi that is x…

Q: A Seattle consumer agency believes that plumbers’ rates are too high and wants to estimate the mean…

A: GivenConfidence Interval(c)=95%Margin of Error(E)=3%=0.03Let…

Q: The median is the point of the _____ percentile of distribution?

A: Median is the value that divides entire distribution between two equal parts also the median is the…

Q: When the Standard Score = -1, what is the percentile of the raw score? %3D O 2nd 14th O 16th 34th…

A: It is an important part of statistics. It is widely used.

Q: 13. If 27 out of 30 people passed a driving test, what percent failed?

A: Given Total people = 30 Passed people= 27 So ,failed people= 30-27 = 3

Q: A recent survey by the U.S. Census Bureau determined that the median monthly housing rent was $631.…

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Q: Is it possible to provide a meaningful interpretation of the estimate b0?

A: The independent variables are 'weekly income x1' and 'family sizex2' and the dependent variable (y)…

Q: The owner of a local bar specializing in alternative music wanted to determine the average age of…

A: t 95% confidence level, the z value is 1.96 which can be obtained by using the standard normal…

Q: In general, % of the values in a data set lie at or below the 98th percentile. % of the values in a…

A: A percentile is the share of values that lie below a given score.

Q: Which percentile would be used to find the multiplier for 60% confidence? Select one: a. 20th…

A: Given find the multiplier for 60% confidence

Q: Is the sample mean always equal to one of the values in the sample? If so, explain why. If not, give…

A: FALSE Lets take sample set S={10,15,20,25,30,35} The mean of above sample S is =…

Q: Find the number of respondents needed in a poll to determine, within 1.5% margin of error, the…

A: The answer is attached below,

Q: What is the z-score corresponding to the 74th percentile

A: Standard normal distribution: The standard normal distribution is a special case of normal…

Q: accounting examination is 26, how large a sample is needed to estimate the true mean score within 6…

A: HERE GIVEN , n = ??? population standard deviation  =  26  confidence level  = 99%

Q: In a moderately skewed distribution, the value of Median is 42 and value of Mode is 40. Find the…

A: Given, x¯ =meanMo =mode=40Me = median =42

Q: Explain why the family confidence level, not the individual confidence level, is the appropriate…

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Q: The head of a computer science department is interested in estimating the proportion of students…

A: Given: Margin of error E = 0.04 Significance level α = 0.05 The critical value Zα/2=Z0.05/2=1.96 The…

Q: An opaque jar contains 300 marbles, all either green or purple. Calista pulls out 10 marbles without…

A: # Given: no of marble in jar N=300  Sample of size n=10 drawn  No of purple marble in sample =2…

Q: Gap, Express, Zara, and America Online are just a few of the many companies interested in knowing…

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Q: A medical researcher wants to do a study on the proportion of knee replacement surgeries that result…

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Q: Is the sample mean always the most frequently occurring value? If so, explain why. If not, give an…

A: No, Sample Mean is not the most frequent Occuring Value.   Mean= Sum of Observations / No.of…

Q: A survey asks: Which online services have you used in the last month: - Twitter Facebook - Have used…

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Q: What is the margin of error for a poll with a sample size of 2000 people? Round your answer to the…

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Q: An educator desires to estimate, within 4%, the true percentage of high school students who study at…

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Q: Out of 147 faculty members at Bellevue University, 13 said they can speak Spanish. Construct and…

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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: Effect on margin of error:If the sample size decreases, then the standard error of statistic…

Q: The results of a nationwide aptitude test in Mathematics are normally distributed with μ=80 and…

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Q: The sampling plan: n = 350 and c = 1, meets a confidence-reliability of (95%, 99%) A. True or False.…

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Q: An entertainment company surveyed 360 elementary school children and found that 153 of them were…

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Q: What is the multiplier for an interval that estimates the proportion with  a. 88% confidence?  b.…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: A newspaper provided a  "snapshot" illustrating poll results from 1910 professionals who interview…

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

Q: doesn't the mean of a sample population equal the true proportion?

A: Yes, the sample population is equal to true proportion.

Q: A marketing manager samples 150 people and finds that 87 of them have made a purchase on the…

A: a) From the provided information, Sample size (n) = 150 Number of people who have made a purchase on…

Q: d. University administrators would like to conduct a new survey in May to update this estimate. They…

A: Given: Margin of error (E) = 2.25% = 0.0225 Confidence level = 98% The estimate from the previous…

Q: A Pew poll taken in 2010 surveyed 830 people aged 18-29 and found that 166 of them had one or more…

A: State the hypotheses.

Q: What is the multiplier for an interval that estimates the proportion with (a) 88% confidence? (b)…

A: a) In the confidence interval that estimates the proportion, critical value is the multiplier. The…

Q: In a sample of 20 men, the mean height was 178 cm. In a sample of 30 women, the mean height was 164…

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Q: State the mean and variance of the sampling distribution of the mean?

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Q: If your target population is 123, how many samples do you need for a sampling error of .05 and a…

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Q: 2. On a placement examination, August scored lower than 1210 of 12,860 students who took the exam.…

A: Given information: On a placement examination, 12860 students appeared. Among these 12860 students,…

Q: How could the survey question "Have you ever had a drink of alcohol?" be revised to obtain a valid…

A: Introduction :- We are given one survey question. We have to revise these questions to obtain valid…

Q: A market researcher wishes to determine the proportion of American consumers who shop online for…

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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.