A sample of size 25 was taken from a very large population. Sample statistics, a and s, were used to find that the 80% confidence interval was (159.046, 166.954). S =

Q: A sample of 28 was taken from a population, and r = .45. What is the 95% confidence interval for the…

A: Correlation coefficient: Correlation analysis is used to measure strength of the association between…

Q: If n=18, (x-bar)=42, and s=17, construct a confidence interval at a 80% confidence level. Assune the…

A: We have given that,  Sample mean (x̄) = 42, standard deviation (s) = 17 and sample size (n) = 18…

Q: a. Find the 90% confidence interval for μ. b. Find the 95% confidence interval for μ. c. What…

A: Given, x=16.7σ2=16n = 60

Q: Two random samples are taken, one from among UVA students and the other from among UNC students.…

A: From the provided information,Confidence level = 92.2%

Q: Construct the indicated confidence interval for the difference between population proportions p1 -…

A:

Q: If X=70​, σ=14​, and n=61​, construct a 99​% confidence interval estimate of the population​ mean,…

A:

Q: A 95% confidence interval for a population mean was reported to be 148.69 to 155.31. If σ = 15, what…

A: given data 95% ci for mean : (148.69,155.31)σ = 15n = ?

Q: Lindsey selected a random sample of 25 tomatoes at the farmer's market. The 95% confidence interval…

A: When Lindsey selected a random sample of 25 tomatoes at the farmer's market, she was aiming to…

Q: If X = 71, a= 14, and n =67, construct a 99% confidence interval estimato of the population moan,…

A:

Q: If n = 22, ¯xx¯ = 36, and s = 14, construct a confidence interval at a 98% confidence level. Assume…

A: From the provided information, Sample size (n) = 22 Sample mean (x̄) = 36 Standard deviation (s) =…

Q: If n = 28, ¯xx¯ = 49, and s = 19, construct a confidence interval at a 90% confidence level. Assume…

A: Given information- Sample size, n = 28 Sample mean, x-bar = 49 Sample standard deviation, s = 19…

Q: construct a confidence interval at a 98% confidence level.

A: Given : n=29 , X-bar=39  , s=11  , α=0.02 Since , the population standard deviation (σ) is unknown.…

Q: A sample of 23 plants was taken and the mean height was 27 cm. A 95% confidence interval for the…

A: From the given information, The 95% confidence interval for the true mean height of plants of that…

Q: Suppose that you will be taking a random sample from a population and that you intend to find a 95%…

A: Solution: The confidence interval for the population mean is calculated by using the following…

Q: A 95% confidence interval for the population proportion of professional tennis players who earn more…

A: 95% confidence interval for p : (0.82,0.88)Sample size used(n) = ? Margin of error : E = sample…

Q: If n=24, ¯xx¯(x-bar)=49, and s=9, construct a confidence interval at a 80% confidence level. Assume…

A:

Q: If X 121, o =27, and n 38, construct a 95% confidence interval estimate of the population mean, u.…

A:

Q: Construct the indicated confidence interval for the difference between population proportions p1-p2.…

A:

Q: A sample of size 84 was taken from a very large population. Sample statistics, x¯ and s, were used…

A:

Q: A human resource manager wants to see if there is a difference in the proportion of minority…

A: Given:- A human resource manager wants to see if there is a difference in the proportion of minority…

Q: A sample of 50 students was taken from the local university. These students spent an average of R170…

A: Given information- Sample size (n) = 50 Mean x̅ = R170 Standard deviation (s) = R25.50 Significance…

Q: A 95% confidence interval forp is given as (0.34,0.66). How large was the sample used to construct…

A: Formula for the sample size needed to estimate a population proportion is

Q: If n = 17, ¯xx¯ = 33, and s = 6, construct a confidence interval at a 99% confidence level. Assume…

A: We have, If n = 17, x¯ = 33, and s = 6, alpha=1-0.99= 0.01 Therefore  Degrees of freedom= n-1=16…

Q: A human resource manager wants to see if there is a difference in the proportion of minority…

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

Q: A random sample of high school students is used to estimate the mean time all high school students…

A: Solution: From the given information, a 99% confidence interval is 1.7 hours to 3.1 hours.

Q: If a 90% confidence interval for µ is [15, 25],  then X=?, e=?

A: Note: Hello! Thank You for the question. We are considering 'e' as margin of error. From the given…

Q: A newspaper reported that 90​% of people say that some coffee shops are overpriced. The source of…

A:

Q: Free of CVD       Prevalent CVD    Total Men          1548                 244                 1792…

A: Given The tota number of men with CVD =244The tota number of women with CVD =135The tota number of…

Q: A sample of 30 beams has an average strength of 1908.8 lbs. and s = 327.1. what is the 95%…

A:

Q: If n = 15, ¯xx¯ = 43, and s = 11, construct a confidence interval at a 98% confidence level. Assume…

A: Given that, The degree of freedom is, Critical values: The t-critical values for a two-tailed…

Q: Out of a survey of 3200 people who own a hot tub, only 70% use it at least once each week. This was…

A: Solution: From the given information, p-hat is 70% and the margin of error is E=1.7%.

Q: If n=41, ¯x=39, and s=16, construct a confidence interval at a 99% confidence level. Assume the data…

A: Given that  Sample size (n) = 41 Sample mean (x¯) = 39 Sample standard deviation (s) = 16 Confidence…

Q: If n = 530 and X = 424, construct a 99% confidence interval for the population proportion, p. Give…

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Q: Find the following. Enter your answer rounded to at least two decimals. Z/2 for the 88% confidence…

A: GIVEN DATA,WE HAVE TO FIND OUT THE VALUE OF OF Z CRITICAL VALUE FOR GIVEN DATA HERE CONFIDENCE…

Q: Independent samples from two different populations yield the following data. x1=200,x2=963,…

A: Given  x1=200,x2=963, s1=19,s2=86 Find 90%CI for u1-u2

Q: Suppose that you will be taking a random sample from a population and that you intend to find a 95%…

A: If the sample size increases, then the standard error of statistic decreases. The margin of error is…

Q: An arborist is interested in determining the mean diameter (in centimeters) of mature white oak…

A:

Q: If the number of smokers in a sample of 160 students selected from university A is 56 and the number…

A: From the provided information,

Q: A random sample of high school students

A: Here it is given that, A 99% confidence interval based on this sample is 1.7 hours to 3.1 hours

Q: The 85.7% confidence interval estimate for p was (0.14, 0.16). Find ?′ and ME

A:

Q: The Za/2 value for a confidence interval is found as 1.29. What is the confidence level? Select one:…

A: To calculate: The Confidence level

Q: A new drug to treat high cholesterol is being tested by pharmaceutical company. The cholesterol…

A: Mean difference (M) = 15.91 mg/dL Standard deviation of the mean difference (s) = 15.2714 mg/dL…

Q: Surveys were sent to a random sample of owners of all-wheel-drive (AWDAWD) vehicles and to a random…

A: Solution: State the hypotheses. Null hypothesis: That is, there is no difference in the proportion…

Q: If n=29, x¯=48, and s=13, construct a confidence interval at a 90% confidence level. Assume the data…

A: The confidence level is 90%. Then the probability is 10%=100%-90%. The degrees of freedom is,…

Q: You are comparing men and women on hours spent watching TV. You pick a sample of 12 men and 14 women…

A:

Q: À 90% confidence interval for p is given as (0.26,0.54). H

A: Given, a 90% confidence interval for p is given as (0.26, 0.54).