What is the confidence interval estimate for the population mean? If the sample mean is 13 and error bound for the mean is 3.2.

Q: Find the critical value for the population mean if there are 756 cats in a sample and you want a 91%…

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Q: If a 92% Confidence Interval for the Population Mean is (67.8, 78.9), find its Margin of Error.

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Q: Suppose we know that a confidence interval is (-.735, .125). Find the sample mean and the error…

A: Ans- Given,     a confidence interval is (-.735, .125). Find  the sample mean and the error bound.

Q: Suppose we know that a confidence interval is (27,35), with a margin of error of 4. Find the sample…

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Q: Suppose the desired confidence level is fixed, then what is the effect of a larger sample size on…

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Q: What is meant by saying that a 1-a confidence interval is a. exact?b. approximately correct?

A: a.Confidence Interval:Confidence interval is the interval estimate of the population parameter. It…

Q: Vhat is the confidence interval estimate of the population mean p7

A: Given: n=49X=2.9σ=18.7We have to find 95% confidence interval for mean μ.Zα/2=1.96

Q: If a 90% confidence interval for the mean is found to be (1.25,4.75) using a sample of n=100, find…

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Q: In an effort to estimate the mean amount spent per customer for dinner at a major Atlanta…

A: From the provided information, Sample size (n) = 49 Sample mean (x̅) = $24.80 Population standard…

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

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Q: What is the impact on the confidence interval estimate if a larger sample is used?

A: Confidence interval:

Q: Determine the margin of error for the confidence interval for the mean: 21+1.2 The margin of error…

A: Confidence Interval formula for mean is given by, => (X bar + - z* sigma/√n) Where X bar is mean.…

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: Increasing the sample size will decrease the margin of error in your confidence interval.

A: Use the theory of confidence interval to solve this problem.

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: Identify the t-score for a 90% confidence interval if the sample size is 31. t =

A: c1=90%n=31α=1-0.90=0.10df=n-1=31-1=30

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

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Q: As the sample standard deviation increases when all other parts of the confidence interval stay the…

A: We want tell the sample standard deviation increases when all other parts of the confidence interval…

Q: Explain the steps in computing a confidence interval for ρ?

A: Introduction: The steps to construct a confidence interval in general are: Identify a sample…

Q: Suppose our estimate for the mean score for the Player A group was 48 ± 5% SE (standard error). What…

A: Given: Point estimate = 48 Standard error = 5 Confidence level = 95%

Q: From the data, identify the best point estimate of the population mean and 95% confidence interval…

A: We know that, The best point estimate of the population mean is sample mean .

Q: When finding confidence intervals for one population mean, if you want a 95% confidence interval,…

A: Solution: Note: Hello! As you have posted 3 different questions, we are answering the first…

Q: What is A confidence interval for μ?

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Q: What happens in a confidence interval if the size of the sample increases the length of interval

A: WIdth of a confidence interval = W Margin of error = E

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: What effect does increasing the sample size have on the width of a confidence interval? I know that…

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Q: Assume that you took a sample and calculated the sample mean as 100.you then calculated the lower…

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Q: if you increase the sample size and confidence level at the same time. what will happen to the width…

A: The formula for the confidence interval (say) for population mean is :  C.I= x ± zα/2.s2n As the…

Q: What prerequisites should students have the knowledge of before calculating the confidence intervals…

A: Determine the prerequisites should students have the knowledge of before calculating the confidence…

Q: The 95% confidence interval for the mean contains the sample mean with 95% certainty.TrueFalse

A: The confidence interval provides us a different range at different levels of significance. Since,…

Q: Find the critical t value to use in making an 80% confidence interval for a mean if the sample size…

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Q: Construct a 95% confidence interval of the population proportion using the given information X…

A: Obtain the 95% confidence interval for the population proportion. The 95% confidence interval for…

Q: Indentify the t-score for a 95% confidence interval if the sample size is 50 t=

A: Given n=20 CI=95%

Q: identify the t-score for a 90% confidence interval if the sample size is 31.        t=

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Q: What critical values would you use to calculate the 90% confidence interval if your sample size is…

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Q: Why do we use a t-distribution to compute confidence intervals for population means?

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Q: When computing a confidence interval, the size of the error term depends on what?

A: The formula to calculate the error term for confidence interval is as follow:

Q: A sample size must be determined for estimating a population mean given that the confidence level is…

A: Solution: From the given information, the E=0.24, largest value is 18 and the smallest value is 6.…

Q: A 90% confidence interval for a population mean is (10, 20). What is the margin of error of the…

A: Given  alpha=0.10,  CI=(10,20)

Q: What is the confidence interval estimate of the population mean u?

A: From the given sample data :  The sample size is , n=10 The sample mean is , X¯=∑Xn=1742/10=174.2…

Q: What is meant by saying that a 1−α confidence interval is a. exact? b. approximately correct?

A: a) 1−α confidence interval is Exact means that the probability that the unknown value of population…

Q: What is the formula for CONFIDENCE INTERVAL (CI) FOR μ1 – μ2 (TWO INDEPENDENT SAMPLES)?

A: From the given information, consider two independent samples drawn randomly with sample sizes n1 and…

Q: Suppose you compute a 93% confidence interval. What will happen to the confidence interval if you…

A: Increasing the confidence level increases the margin of error. This will increase the width or range…

Q: A researcher wishes to estimate the 95% confidence interval of the proportion of students who show…

A: Given  e=Margin of error=30%=0.30,  p^=30%=0.30, level of significance ɑ=0.05

Q: What will happen to the precision of a confidence interval if the variability of a sample gets…

A: Farmula  Length of Confidence interval=2xZcxσ/√n

Q: What does a confidence interval for m indicate? When do we compute a confidence interval?

A: Confidence intervals: Confidence intervals are the limits for the point estimate of population…

Q: Determine the margin of error for the confidence interval for the mean: 16+1.5 The margin of error…

A: We have given confidence interval is- 16 ± 1.5 Since we know that, Confidence interval = the…

Q: A survey was conducted to determine the proportion of adults who approve of attempts to clone a…

A: Given,   Lower bound = 0.09 Upper bound = 0.13   The objective is to find the point estimate of the…