In a random sample of 500 children from Illinois, 143 were undernourished. Use these sample data to answer the following questions. p-value 0.000 test statistic is -9.57                                                                                          What sample size would be needed to construct a 95% confidence interval to estimate the proportion of all children in Illinois who are undernourished with a margin of error of ±5%? Use the observed sample proportion from the scenario as an estimate for the population proportion. You will need to do calculations by hand.

Q: Suppose the NCES would like to re-do their study. If they want a 95% confidence interval with a…

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Q: Here are summary statistics for randomly selected weights of newborn​ girls: n=232​, x=32.3 ​hg,…

A: Given, Sample Size(n)=232 Sample Mean=32.3 Standard Deviation=6.5 Confidence Level=90%…

Q: A manager needs to know the proportion of employees who have insurance. He selects 200 employees and…

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Q: Suppose we wanted to estimate the average amount of sleep (in hours) a college student gets a night.…

A: Confidence interval : Confidence interval is a range of values it contains the true population…

Q: A survey of several 8 to 11 year olds recorded the following amounts spent on a trip to the mall:…

A: The amounts spent on a trip to the mall is 19.36,29.95,7.82,8.36,21.07,14.06,22.22

Q: A 95% confidence interval of 19.1 months to 48.7 months has been found for the mean duration of…

A: Given data: Given confidence interval = (19.1 , 48.7 ) Standard deviation  = 42 months Mean = 36.2

Q: I want to create a 95% confidence interval for the average price of coffee in West Virginia. I have…

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Q: Construct a confidence interval for the mean of the paired differences for the two populations with…

A: Solution: From the given information, n=32, d-bar=1.358, α=0.05 and sd=0.635.

Q: In a survey of 3700 TV viewers, 834 said they watch network news programs. Find the margin of error…

A: Solution

Q: A poll reported 38% support for a statewide election with a margin of error of 1.36 percentage…

A: Proportion of voters who supports for a statewide election Margin of error Confidence level

Q: For a sampling distribution of n = 500 and population proportion of 0.48 of those who prefer cookies…

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Q: Aresearcher wanted to know the percentage of judges who are in favor of the death penalty. He took a…

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Q: The administration at Pierce College conducted a survey to determine the proportion of students who…

A: The administration at Pierce College conducted a survey to determine the proportion of students who…

Q: If n=41n=41, ¯xx¯=36, and s=9s=9, find the margin of error for a 80% confidence level.

A: Answer - Given, Sample size n = 41,    x  = 36    and s = 9               80% confidence interval…

Q: A survey was conducted that asked 1007 people how many books they had read in the past year. Results…

A: given that,sample mean, x =12.2standard deviation, s =16.6sample size, n =1007standard error = sd/…

Q: Calculate the lower endpoint of a two-sided 95% confidence interval for the population mean using…

A: given data sample size (n) = 32sample mean ( x¯ ) = 0.485sample standard deviatio (s) = 0.36995% ci…

Q: Last year your professor taught economics courses to N = 200 students. From this group you randomly…

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Q: Estimate 95% confidence interval for the proportion of household experiencing burglary in 2010."

A: 25.8 households per 1,000 were the victims of home burglary. These data are obtained from a survey…

Q: A statistics instructor randomly selected four bags of​ oranges, each bag labeled 10​ pounds, and…

A: Given X-bar=9.45 n=4

Q: ← A large family-held department store had the business objective of improving its response to…

A: Given data is…

Q: Suppose you calculate a 95% confidence interval for a proportion to to be: 0.39 to 0.78. Determine…

A: Given,   Lower bound = 0.39​ Upper bound = 0.78   Here, we use to determine the margin of error.

Q: Mr. Price calculates a 95% confidence interval for the difference between the proportion of Aaron…

A: The 95% confidence interval for P Rodgers - P Mahomes is given as (-0.05, 0.15). When the repeated…

Q: In a random sample of 144 observations, the sample proportion is 0.90. Construct a 95% confidence…

A: given data sample size (n) = 144P^ = 0.9095% ci p.

Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In the​ poll,…

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Q: If X=72​, σ=13​, and n=66​, construct a 95​% confidence interval estimate of the population​…

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Q: Your professor wishes to estimate the proportion of ALL high school students enrolled in…

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Q: If n = 530 and X = 424, construct a 99% confidence interval for the population proportion, p. Give…

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Q: If n= 220, p-hat= .4, then what will be the 87.4% confidence interval for the population proportion?

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Q: a. Construct a 99% confidence interval estimate for the population mean number of days between the…

A: Answer:- Given data…

Q: 20. Suppose a 90% confidence interval is stated as (0.3011, 0.4189). What is the sample proportion…

A: The given 90% confidence interval for population proportion is, (0.3011, 0.4189) The upper limit is,…

Q: We plan to sample parents in order to construct a 99% confidence interval for the proportion who…

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Q: Ve want to know how many people plan on buying a cell phone this year. Determine the sample size…

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Q: You want to survey students to see what proportion of them have taken Statistics 101. This survey…

A: Margin of error(M) = 4% = 0.04 Confidence interval = 95%

Q: A sample of freshman takes a reading comprehension test and their scores are summarized below.…

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Q: A survey of 1000 people was conducted. 44% said they found it hard to adopt a child in the US.…

A: The given data is as follows:Sample size, Sample proportion, Margin of error, Confidence level, The…

Q: An insurance company selected samples of clients under 18 years of age and over 18 and recorded the…

A: Given Information: Under age of 18  n1=480 x1=160 Over age of 18 n2=500 x2=140