What sample size should you gather to achieve a 0.7 hour margin of error?

Q: 2) Assume the p=.03 (3%). How large a sample is needed to estimate the proportion of breast cancer…

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Q: ou want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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Q: or the population of 31 companies surveyed, with an average size of 1,414 workers? What type of…

A: Given  Average size = 1414 Companies = 31 The total population will be = 31*1414 =43834

Q: By how much the sample size n be increased if the width of the CI (T± za/2%) is to be halved? Show…

A: Given, The confidence interval is x¯±zα2σn Here, n is the sample size.

Q: Suppose you wish to determine the proportion of college students in NC who receive some form of…

A: Givenconfidence level=95%Margin of error(E)=0.04sample proportion(p^)=0.78

Q: You work for NASA and are interested in determining the population proportion, with 99% confidence,…

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Q: The margin of error in a research study is indicative of the precision and accuracy of the research…

A: Margin of error is a measure of the extent to which the sample may vary from population.  It is a…

Q: Data from a representative sample were used to estimate that 31% of all computer users in a recent…

A: The preliminary estimate is, p=31%=0.31The defined margin of error is, E=0.05Since the level of…

Q: ou want to obtain a sample to estimate a population proportion. At this point in time, you have no…

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Q: If the population of city A is 20 000, so the computed sample size is less than 5% of population…

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Q: Suppose that your sample size was 37, what is P(t<-1.74) (Negative 1.74)?

A: Given information- Sample size, n = 37 t-score = -1.74 We have to find the p (t&lt;-1.74). Degree of…

Q: Applying the law of large numbers, which sample mean would expect to be closer to the population…

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Q: If you want to be99​% confident of estimating the population proportion to within a sampling error…

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

Q: a researcher wants to estimate a population proportion with a margin of error of 0.05. What is the…

A: Given that the margin of error is 0.05. Given confidence level is 95% Significance level is 5% From…

Q: A simple random sample of 400 individuals provides 100 Yes response.  What is the estimate of the…

A: We know that,  If P is population proportion and  p^ is sample proportion then standard error of…

Q: You want to obtain a sample to estimate the percentage of college students in the U.S. that get a…

A: It is given that margin of error (E) is 0.03 and the confidence level is 0.95.

Q: A rare birth defect occurs in approximately 0.5% of all cases in males. If we sample all the males…

A: Given information: The total number of males born in 2016 in a specific region is N = 200,000. It is…

Q: If a researcher were to increase a sample size from n = 30 participants to n = 80 participants, what…

A: Increase power

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: According to the provided information, Proportion is unknown. So, worse case proportion is 50%. p =…

Q: se 95% CI.

A: Given that  An environmentalist is interested in the opinions of adults on the issue of global…

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

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Q: When finding the t-value, how many degrees of freedom do we have from a sample size of n=10?

A: Degrees of freedom = n-1

Q: Exhibit 9-22 The manager of a grocery store has taken a random sample of 36 customers. The average…

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Q: If we would like to decrease the margin of error without changing the sample size, what must happen?

A: We have to find what to do to decrease margin of error.

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: sample size n=?

Q: For a sample of n=16 scores, how many scores are used to calculate the sample variance?

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Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

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Q: You want to obtain a sample to estimate the proportion of a population that possess a particular…

A: Given, p=68%=0.68, c=0.99 and E=1.5%=0.015.

Q: What's the probability that you made a Type I error? There is no Type I Error Half a percent OA…

A: Given Information: BMI of a five year old girl is 15.  That is, the hypothesized value of population…

Q: A sample proportion is calculated from a sample size of 132. How large of a sample would we need in…

A: given data  sample size (n) = 132 how large the sample required to decrease standard error by factor…

Q: What are the practical Reasons for learning how to use the formula in determining sample size?

A: The two major factors affecting the power of a study are the sample size and the effect size A…

Q: estimate the population proportion p,what is the minimum sample size we need in order to achieve a…

A: Solution: From the given information, confidence level is 0.95, p=0.1 and E=0.01.

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Given that, Critical value: Using the z-table, the critical value at 95% confidence level is ,

Q: Data from a representative sample were used to estimate that 33% of all computer users in a recent…

A: P=0.33E=0.04

Q: Find the regression equation, letting overhead width be the predictor (x) variable. Find the best…

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Q: Determine the number of samples you will choose from a population of 5,200 considering that you…

A: Given:  Population size N=5200  Margin of error e=5%  Then to find sample size n=??