If the population proportion is 0.7 . A researcher wants the margin of error to be 0.20 and the level of confidence is 95% . What is the require sample size?

Q: Assume that population proportion is to be estimated from the sample described. Use the sample…

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Q: Find the sample size need to find the Population Mean if the margin of error is $105, the confidence…

A: Solution: From the given information, confidence level is 0.95, σ=315 and E=105.

Q: Find the indicated margin of error. Out of 260 trials, 150 turned out positive. Find the margin of…

A: It is given that the sample size (n) is 260 and the number of positive trials (x) is 150.

Q: or each combination of sample size and sample proportion, find the approximate margin of error for…

A: We find Margin of Error (M.E)  for 95% C.I. (d) (e)

Q: What sample size should be obtained if he wants to be within 4 percentage points with 95​%…

A: Given that the margin of error is 4 percentage points. That is, ME=4%=0.04 Confidence level =95% The…

Q: Use the given confidence interval to find the margin of error and the sample proportion. (0.704,…

A: The confidence interval for population proportion is given by (0.704, 0.732)

Q: Before making decisions about changing branch manager salaries the bank wants to estimate average…

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Q: What is the purpose of finding a confidence interval for a proportion?

A: A true (or population) proportion (denoted as p), by definition, is essentially determined as the…

Q: Using the given margin of​ error, confidence​ level, and likely range for the observed value of the…

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

Q: Determine the sample size for the estimate of u if the margin of error E= 0.10, o=0.85, and the…

A: Given,Margin of error, E = 0.10Population standard deviation, σ = 0.85Confidence level, C = 99% =…

Q: if ue want a 96%. confidence nterval on populatron mean with a sample size of a3, find or 土

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Q: What is the t-value for a 95% confidence interval given that the sample size is 16? Write the exact…

A: Given: confidence level =95%  Sample size n=16  Then degree of freedom for t-test is =n-1  To find…

Q: Assume that population mean is to be estimated from the sample described. Use the sample results to…

A: Given95% confidence interval N=361 x = 59.1 seconds. z= 4.9 SecondsFind the margin of error?

Q: Use the given data to find the minimum sample size required to estimaate the population proportion.…

A: As p and q are unknown, consider the values of p and q as 0.5.

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

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Q: Determine the most conservative sample size for the estimation of the population proportion for the…

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

Q: students. You want to estimate the proportion p of students who never floss with 90% confidence and…

A: It is given that Proportion p = 0.27 Margin of error E = 0.03 Level of confidence = 90% The critical…

Q: Use the sample data and confidence level given below to complete parts (a) through​ (d).   A…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…

Q: The estimated prevalence is 11%, and the desired confidence level is 91% with a margin of error of…

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Q: Find the population proportion? find the margin of e? construct confidence interval ?

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Q: estimate of for the following. E = .17, ? = .90, confidence level = 99%

A: (1) We have given that,  Population proportion (p) = 0.90, margin of error (E) = 0.17 and…

Q: What Influences the Sample Size? We examine the effect of different inputs on determining the sample…

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Q: What should your sample size be if you want a confidence level of 90 percent and a margin of error…

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

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A:

Q: assume that a sample is used to estimate a population proportion p. find the margin of error that…

A: Givensample size(n)=325x=54.2p^=xn=54.2325=0.1668confidence level = 95%

Q: Determine the most conservative sample size for the estimation of the population proportion for the…

A: The formula to compute sample size using population proportion 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: Use the confidence interval to find the margin of error and the sample mean.   (0.676,0.800)

A: The margin of error is the most common term which we use in a confidence interval. It is the degree…

Q: Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E.…

A: Solution: Given information: n= 220 Sample size  x= 110 successes  p^=xn=110220= 0.5 Sample…

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A: Confidence interval (0.761,0.785)

Q: Assume that a sample is used to estimate a population proportion p. Find the margin of erre that…

A: Given data, n=800 p=0.40 z-value at 98% confidence is Zc=2.326

Q: When conducting a test of hypothesis for dependent samples: the sample size should be at least 30…

A: Paired values for the same set is known to be dependent samples .  'n' refers to sample size.

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: What sample size is needed to give a margin of error within ±3% in estimating a population…

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Q: Use the given data to find the minimum sample size required to estimate the population proportion.…

A: The confidence level is 95% Therefore, α = 0.05 and α/2=0.025. The margin of error is 0.01 Here, p=…

Q: assume that a sample is used to estimate a population proportion p. find the margin of error E that…

A: The confidence level is 0.02.

Q: Assume that a sample is used to estimate a population proportion p. Find the margin of error E that…

A: The question is about confidence interval.Given :No. of selected observations ( n ) = 1400Sample…

Q: Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years…

A: p = 0.5 Margin of error = 0.01

Q: Determine the most conservative sample size for the estimation for the population proportion for the…

A: From the provided information, Confidence level = 95% Margin of error (E) = 0.03

Q: In a sample survey, 138 students failed the exam out of 200 total students.  1. Calculate the 95%…

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Q: We want to be at least 95% confident that the error is at most 0.06, then the sample size is.. A.…

A: Solution

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.