What value of tn-1 would be used to construct a 99% confidence interval for the mean with a sample size of n = 17. (a) 2.921 (b) 2.898 (c) 2.583 (d) 2.561

Q: In a sample of 16 fish from my pond it was found that 5 are under 165 grams in weight. Based on this…

A: Given  n=5 p= 5/16 = 0.312 1-p = 1-0.312 = 0.688 Standard error SE = p(1-p)/n

Q: What is the chi-square value for the region to the right for a 999% confidence interval if the…

A: From the given information, the test is right-tailed, n=30

Q: Suppose a different police department says their SRS resulted in a 95% confidence interval of 10.1%…

A:

Q: Determine the point estimate of the population mean and margin of error for the confidence interval…

A: To find: 1. Point estimate for population mean 2. Margin of error for population mean

Q: A sample of 25 bottles of orange juice were measured and the sample standard deviation is 1.8…

A:

Q: A poll conducted in 2013 found that 52% of U.S. adult Twitter users get at least some news on…

A: Solution: From the given information,

Q: If a sample of 25 fish from my pound has mean weight 157 grams with a standard deviation of 8.3…

A: Solution: Let X be the weight of fish. From the given information, x-bar=157 grams, S=8.3 grams and…

Q: The 92% confidence interval for the true proportion of Lexus cars in Muscat city is 0.1<P<0.2. What…

A: Obtain the point estimate of the proportion. The point estimate of the proportion is obtained below:…

Q: What is the minimum sample size needed to construct a 95% confidence interval for the mean household…

A:

Q: What is the talpha/2 value to use for calculating a confidence interval from a sample of size 45…

A:

Q: The quality-control manager of a chemical company randomly sampled twenty 100-pound bags of…

A: It is given that the sample variance is 6.62 and the sample size is 20.

Q: From a random sample of 68 businesses, it is found that the mean time that employees spend on…

A: Given dataSample size(n) = 68Sample mean = 4.9 standard deviation = 0.35Significance level(α) =…

Q: 2. A sample of 25 male customers who shopped at a supermarket showed that they spent an average of…

A: Let X1 be the male customers who shopped and spend money at a supermarket and X2 be the female…

Q: What is the minimum sample size needed to construct a 95% confidence interval of the population…

A: Solution: From the given information, confidence level is 0.95 and E=0.05.

Q: If a sample of 4 fish from my pond has mean weight 157 grams with a standard deviation of 8.3 grams…

A: Solution: Let X be the weight of fish in my pond. From the given information, n=4, x-bar = 157…

Q: If a school district takes a random sample of 75 Math SAT scores and finds that the average is 433,…

A:

Q: Here is a 95% confidence interval estimate of the proportion of female medical school students:…

A: The formula for point estimate is,

Q: A 95% confidence interval for the mean was computed with a sample of size 90 to be (16,22). a. What…

A:

Q: In a recent year, a sample of the South American Redeye Piranha was collected by fishermen on a…

A: We have to interprete data.

Q: A random variance survey of 495 adults found that 59 had diabetes. which of the following is a 98%…

A:

Q: If a school district takes a random sample of 75 Math SAT scores and finds that the average is 433,…

A: It is given that the mean is 433 and the population standard deviation is 100.

Q: A poll conducted randomly in 2014 found that 52% of U.S. adult Twitter users get at least some news…

A: Proportion is 0.52. The standard error 0.024 The absolute value of Zα/2 is 2.5758 using the Excel…

Q: The mean amount of the 812 mortgages taken out in a city in the past year must be estimated. Based…

A: Given : Population S.D (σ) = 20000 Confidence Level = 95% Margin of error (E) = 2000

Q: If a sample of 25 fish from my pound has mean weight 157 grams with a standard deviation of 8.3…

A: Given information Sample size(n) = 25 Sample mean = 157g Population standard deviation (σ) = 9.4 g…

Q: A study by the department of education of a certain state was trying to determine the mean SAT…

A:

Q: A report published by the BZW Luxury Association shows that each American household spent on average…

A: The confidence level is 99%. For, 1-α=0.99α=0.01 Computation of critical value: The critical value…

Q: If a school district takes a random sample of 89 Math SAT scores and finds that the average is 494,…

A:

Q: Determine the point estimate of the population mean and margin of error for the confidence interval…

A: Point estimate: The population parameter which is estimated by using sample statistic is termed as…

Q: A doctor claims that the mean number of hours of sleep that seniors in high school get per night…

A: From the provided information, The claim is that the mean number of hours of sleep that seniors in…

Q: If you construct a 90% confidence interval of the mean amount of money a student receives just from…

A: Given 90% confidence interval of the mean amount of money a student receives just from financial aid…

Q: Using independent random samples, a researcher is comparing the number of hours of television viewed…

A: Given For the seniors of sample size 32, the mean is 3.9 hours with standard deviation of 1.2 hours.…

Q: The lead levels in a random sample of 23 crows in the region were measured and recorded. The mean…

A:

Q: In a study of woman's bone health, a random sample of 8 women was taken, and their daily calcium…

A:

Q: The pH of rain, measured at a weather station in Michigan, was observed for 39 consecutive rain…

A:

Q: A paint manufacturer wants to determine the average drying time of a new interior wall paint. If for…

A: Given Information: Sample size (n) = 12 Sample mean (x¯) = 66.3 Sample standard deviation (s) = 8.4…

Q: Derive the necessary expression for one-sided lower confidence interval for the population variance…

A: we know that if any random variable x follows normal distribution (population) with mean μ and…

Q: The critical value (z -score) for an 84% confidence interval for a two tailed test is approximately…

A: From the given information, The confidence level is 84%. Significance level is 100%-84%=16%=0.16…

Q: a random sample of 63, the proportion of the sample with a certain characteristic was 0.61. What is…

A:

Q: A local health centre noted that in a sample of 400 patients, 80 were referred to them by the local…

A: From the provided information, Sample size of patients (n) = 400 80 were referred by the local…

Q: An educator wants to construct a 99% confidence interval for the proportion of elementary school…

A: The random variable is elementary school children in Michigan who are proficient in reading. It…

Q: 5. In previous years the average number of patients per hour at a hospital emergency room on…

A: n x¯ s Weekends 30 13.8 3.1 Weekdays 30 8.6 2.7

Q: A college alumni Organization sent a survey to all recent graduates to ask their annual income. 20%…

A: Given, All recent graduates of a college were asked their annual income for a survey that was…

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: What is the approximate sample size required to estimate the percentage of Americans who have earned…

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

Q: What is the critical value t* from Table D should be used to calculate the margin of error for…

A:

Q: 3. The mean and standard deviation of the scores of a random sample of 45 Grade 11 students who took…

A: * SOLUTION :-  *(3)

Q: Suppose, upon constructing a 95% confidence interval based on your sample proportion of 0.28, you…

A: It is given that, A random sample of 125 M&amp;M candies is selected where 28% are blue. Sample…

Q: A study by the department of education of a certain state was trying to determine the mean SAT…

A:

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…