How large should n be in order to get a confidence interval that has a width of at most 0.2?

Q: For what value(s) of p^ is the margin of error the smallest in a confidence interval for p? Choose…

A: Margin of Error = z*(standard error ) As p^ decreases, margin of error decreases.

Q: Suppose that you take 1000 simple random samples from a population and​ that, for each​ sample, you…

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Q: 1. Determine the critical value (z*) you would use to create a 94% confidence interval.

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Q: If n = 10, ¯xx¯ = 43, and s = 8, construct a confidence interval at a 90% confidence level. Assume…

A: Since population standard deviation is unknown, Use t-distribution to find t-critical value. Find…

Q: Suppose you compute a confidence interval with a sample size of 100. What will happen to the…

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Q: The t value for a 95% confidence interval estimation with 28 degrees o freedom is 2.467 O 2.052 O…

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Q: The critical value of t for a 95% confidence interval with df equals 108

A: Given:

Q: When constructing a confidence interval for μwhen σis known, we assume that we have a simple random…

A: The standard deviation measures the distance between each data point and the mean. It measures the…

Q: Find the number in the sample with the specified characteristic, x  for the following confidence…

A: The sample proportion formula is, p^=xn In the formula x is number of success, and n is sample size.…

Q: If n=13, (x-bar)=D49, and s-13, construct a confidence interval at a 98% confidence level. Assume…

A: Given problem Given that   n = 13 x-bar = 49 s = 13 Degree of freedom, df = 13 - 1 Degree of…

Q: If n = 22, x¯ = 34, and s = 19, construct a confidence interval at a 98% confidence level. Assume…

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Q: What critical value t* from Table C should be used for a confidence interval for the mean of the…

A: Givena)confidence interval is =80%The level of significance is α=1-0.80=0.20The sample size n=9The…

Q: If a 90% confidence interval for the mean is (75.3 to 80.9), we would reject H0 : = 70 in favor of…

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Q: If n=15, ¯xx¯(x-bar)=30, and s=2, construct a confidence interval at a 98% confidence level. Assume…

A: Given Sample size n = 15  degree of freedom = n-1 =14 x the level of confidence interval   98 %…

Q: A sample of size 10 has a sample mean of 1000. Knowing that o?=100, then a 95% Confidence Interval…

A: We want to find confidence interval Here z will be used as population standard deviation is known

Q: If a 95% confidence interval for the difference in two independent means is (-4.5 to 2.1), then the…

A: Point estimate= (-4.5+2.1/2) Point estimate=-2.4/2 Point estimate= -1.2

Q: Find the critical value zc necessary to form a confidence interval at the level of confidence shown…

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Q: If n = 25, ¯x = 50, and s = 19, construct a confidence interval at a 99% confidence level. Assume…

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Q: Determine the confidence level for confidence interval shown in the figure belov

A: The confidence level is described as (1 - α)

Q: Everything else being equal, a population with a higher mean yields a confidence interval that is…

A: As the formula for confidence interval is: CI=X±Zsn Where: X = Mean of the data's Z = Z-value…

Q: the data obtained from the sample of children. Of the following, which is the smallest sample size…

A: It is given that Population SD = 1.5 Margin of error E = 0.1 Level of confidence = 99% The critical…

Q: A 90% confidence interval is to be found for the proportion of adult males that are married. Find…

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Q: The R output provides a 95% confidence interval for µa that ranges between about 1.09 minutes to…

A: The 95 % confidence interval for parameter is (1.09, 9.76)

Q: Based on the central limit theorem, you were told that a 99% confidence interval for a population…

A: We have to find sample proportion and sample size..

Q: For a confidence level of 94% for a mean with n = 19, find the critical value t.Enter the answer to…

A: Given that, n = 19, c= 94% The degree of freedom is,

Q: Holding everything else constant, what would happen if the sample size had been n=1? The confidence…

A: We have given that the sample satisfaction score is normally distributed with mean 67 and standard…

Q: Find the corresponding x value, its standard uncertainty, w,, and the 95% confidence interval.…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: A country club wants to poll a random sample of its 320 members to estimate the proportion likely to…

A: Given data: Margin of error ( ME ) = 0.05 Random sample (N) = 320 Confidence level  = 99 % To find:…

Q: A company reported that 95% confidence interval for the proportion of household who already own a…

A: Z∝/2=1.96 Use Excel funtion: NORMSINV 0.025

Q: Suppose that you take 1000 simple random samples from a population and that, for each sample, you…

A: Given information Sample size n = 1000 Confidence interval = 95%

Q: and u2 For the following confidence interval, can you conclude that there is a difference between…

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Q: Find t* for a 80% confidence interval based on N = 45 randomly selected observation

A: Given, Sample size n = 45 80% confidence interval

Q: Let us give a 95% confidence interval estimate for the population mean. If the sample mean is 1000…

A: Given Data: Sample mean(x¯)=1000 Standard error(SE)=50   Confidence Level=95%

Q: find the critical value t of alpha over 2 used to construct  the confidence interval for a mean from…

A: It is given that n is 5 and level of significance is 0.02.

Q: 1. Suppose you compute a confidence interval with a sample size of 40. What will happen to the…

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

A: Given data: Margin of error (E) = 0.01 Confidence level  = 99 % To find : The required sample size…

Q: A confidence interval for the difference in the number of friends that men and women have was found…

A: The formula of the midpoint of the confidence interval formula is,

Q: Find the critical value z. necessary to form a confidence interval at the level of confidence shown…

A: Formula : Sampling error = x̅ - u

Q: By how much must the sample size and be increased if the width of the confidence interval 7.5 is to…

A: The confidence interval for population mean is CI=x¯±zα/2×σn The general formula for width of the…

Q: When calculating a confidence interval on a conditional mean for a specific value of X, and a…

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Q: Find the critical value zα/2 needed to construct a(n) 98.3% confidence interval.

A: Here, we need to construct a 98.3% confidence interval. It means, level of significance in the…

Q: In a sample of 41 men, 25 said that they had less leisure time today than they had 10 years ago. In…

A: From the provided information,

Q: suppose that you take 1000 simple random samples from a population and that, for each sample, you…

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Q: find the t sub alpha/2 when n=23 for the 95% confidence interval

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Q: Which equation is the correct confidence interval to use in this problem? X-to/2, X + ta/2유)…

A: From the provided information, Sample size (n) = 30 Sample standard deviation (s) = 12.23

Q: IF n < 30 AND T = Ý-μ SI√n² SHOW HOW THE 100(1-2α)% CONFIDENCE INTERVAL FOR IS DERIVED

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Q: If n-10, 2(xbar)-40, and s-4, construct a confidence interval at a 98% confidence tevel. Assume the…

A: The summary of statistics is, x¯=40,s=4,n=10 The degree of freedom is, df=n-1   =10-1   =9 Critical…

Q: Find the critical value zα/2 needed to construct a(n) 99.2% confidence interval.

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Q: Find the critical value zc necessary to form a confidence interval at the level of confidence shown…

A: It is required to find the z-critical value to form a 95% confidence interval. The critical value…

Q: Find the a/2 ( the area in one tail outside of the confidence interval) and the critical value z a/2…

A: The confidence level is 0.80.