It is known that the population range equals 60. With a 95% confidence level, the sample size that needs to be taken if the desired margin of error is 4 or less is

Q: If n = 340 and p^=0.92, find the margin of error at a 90% confidence level E= Give your answer to…

A: Given,n=340p^=0.921-p^=1-0.92=0.08α=1-0.90=0.1α2=0.05Z0.05=1.645

Q: Find the value of ta for a 99% confidence interval when sample size is 30

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a…

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: Given information Error = 4% = 0.04 Confidence level = 0.95

Q: Find the sample size needed if a 98% confidence interval has a 'margin of error' of 4% if .. a) You…

A: From the provided information, Margin of error (E) = 0.04 Confidence level = 98% The z value at 98%…

Q: Determine the margin of error for the confidence interval for the proportion: 0.509<p<0.845 The…

A: The given confidence interval is about population mean. We have to find the margin of error. Margin…

Q: Find a 90% confidence interval for the population mean, if the sample size is 58, the sample mean is…

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Q: We wish to know the 95% confidence interval for the population proportion of people who believe that…

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Q: What is the minimum required sample size to make a 97% confidence interval for a population…

A:

Q: With a large sample size such as n = 100, we do not need to assume the distribution is normal in…

A: True.Central limit theorem:In the process of selecting a simple random samples of size n from a…

Q: If a confidence interval for the mean is (34≤μ≤86)(34≤μ≤86), a) What is the point estimate?    b)…

A: (a) The point estimate is 60, which is obtained below: Point estimate=Upper limit+lower…

Q: Suppose you had a sample size of 41 and the population distribution was normal. Which approach would…

A: Here we use basic criteria for getting best interval estimation of mean

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A:

Q: If you knew that a study reported that 73% of pre-kindergarten children ages 3 to 5 whose mother had…

A:

Q: Suppose we know that a confidence interval for a population mean is (53, 67), with a margin of error…

A:

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: confidence interval for the mean of five measurements is smaller than for a single result.

A: Here we use confidence interval formula for explanations as given in step 2

Q: If you think a data point is an outlier, what test can you perform to see if you should omit the…

A: Given that the number of data points in the set is 8.

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: Suppose you survey a random sample from a large population to understand the population proportion.…

A: Given information- Margin of error, E = 6% = 0.06 Confidence level, c = 98% Since nothing is known…

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: According to the provided information, The z score at 95% confidence interval from the standard…

Q: In a study of government financial aid for college​ students, it becomes necessary to estimate the…

A: Find z-critical value:…

Q: Suppose we wish to find the required sample size find a 90% confidence interval for the population…

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Q: A quality controller wants to estimate the proportion of high quaity goods out of a batch of…

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Q: Find the margin of error that corresponds to a sample of size 210 with 70% successes at a confidence…

A: Sample size is 210. Percentage of successes is 70%. Percentage of confidence level is 90%.

Q: If a confidence interval for the mean is (31≤μ≤87) a) What is the point estimate?    b) What is…

A:

Q: If we wanted to reduce the margin of error to 3.5 per cent, how big would our sample ze have to be…

A: We have given that,  Margin of error (E) = 3.5% = 0.035 and confidence level = 95% = 0.95 Then,  We…

Q: Identify the y-score for a 99% confidence interval if the sample size is 35.

A: We have to find critical value for given data..

Q: In a study of government financial aid for college students, it becomes necessary to estimate the…

A:

Q: If you knew that I study reported that 67% of pre-kindergarten children ages 3 to 5 whose mother had…

A:

Q: Suppose you survey a random sample from a large population. How large must your sample be if you…

A: According to the provided data, the margin of error is 0.06 and the confidence level is 0.98. Since,…

Q: A television sports commentator wants to estimate the proportion of Americans who "follow…

A: The value of confidence level (CL) is 0.95.

Q: Assume that a sample is being used to estimate a population mean μμ. If n = 19, x¯ = 43, and s = 3,…

A:

Q: In a study of government financial aid for college​ students, it becomes necessary to estimate the…

A: (a)compute sample size ( n ) = n=(Z/E)^2*p*(1-p) Z a/2 at 0.1 level of significance is = 1.645sample…

Q: Suppose we know that a confidence interval for a population proportion is (0.572, 0.662), with a…

A:

Q: ce interval for the mean is (44 ≤ μ ≤ 98), a) What is the point estimate?

A: a) The Point estimate can be calculated as: Point estimate=LowerLimit+UpperLimit2=44+982=71

Q: When calculating confidence intervals for differences between two population means, the sample size…

A: Determine whether the given statement is true or false

Q: If the sample size is large, the confidence interval estimate for the difference between two…

A:

Q: find tc for a 95% confidence level when the sample size is 6.

A: level of significance, alpha = 0.05from standard normal table, two tailed t alpha/2 with n-1 = 6 d.f…

Q: The estimated prevalence is 25% and the desired confidence level is 95% with a margin of error of 4%…

A: The estimated prevalence =25% E= 4% CI =95% CI= 0.95 p= 0.25 E= 0.04

Q: Suppose you are designing a survey of firework plans among Kansas residents. You would like for the…

A: Here we need to find the required sample size with a 95% confidence level to estimate the number of…

Q: If no previous study has been done, give the sample size we should use to find p with a margin of…

A: From the provided information, Margin of error (E) = 0.02 The confidence level = 90% The sample…

Q: Suppose a 90 percent confidence interval to estimate a population proportion was calculated from a…

A: The confidence interval for proportion can be calculated as follows:

Q: For the same sample statistics, which level of confidence would produce the widest confidence…

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Q: If we increase our sample size the width of the confidence interval will

A: As the sample size increases, the standard error decreases and the margin of error also decreases.…

Q: What is the t-value for a 90% confidence interval given that the sample size is 26? Write the exact…

A:

Q: Suppose we know that a confidence interval for a population proportion is (0.105,0.355), with a…

A: Obtain the margin of error. The margin of error is obtained below: Margin of Error: The margin of…

Q: If a retailer would like to estimate the proportion of their customers who bought an item after…

A: Solution: 3. From the given information, confidence level is 0.90 and E=0.03.

Q: Suppose the sample mean is 5.0 and with 95% confidence, the margin of error is 2.5. Then, the…

A: Given:

Q: If n=360 and ˆp(p-hat) =0.69, find the margin of error at a 95% confidence level

A: