Assuming that the population is normally distributed, construct a 90% confidence interval for the population mean, based on the following sample size of n = 8. 1, 2, 3, 4, 5, 6, 7, and 25 D In the given data, replace the value 25 with 8 and recalculate the confidence interval. Using these results, describe the effect of an outlier (that is, an extreme value) on the confidence interval, in general. Find a 90% confidence interval for the population mean, using the formula or technology.

Q: Find the t-value that would be used to construct a 90% confidence interval with a sample size n = 18…

A:

Q: Assume that population proportion is to be estimated from the sample described. Use the sample…

A: sample size(n)=515sample proportion=0.20Confidence level=95%

Q: Construct a confidence interval for the mean of the paired differences for the two populations with…

A:

Q: If X = 114, α= 20, and n = 33, construct a 99% confidence interval estimate for the population mean,…

A: Given data:  Sample Mean = 114 Population standard deviation = 20 Sample size = 33 Confidence level…

Q: Assume that you want to construct a 95% confidence interval estimate of a population mean. Find an…

A:

Q: 3. needed to estimate the percentage of adults who can touch their nose with Find the sample size…

A:

Q: Construct the confidence interval for the population mean y. C=0.95, x= 16.7, o= 4.0, and n= 75. A…

A: Here, C=0.95, x=16.7, σ=4.0, and n=75.

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: Find the margin of error for the 95% confidence interval used to estimate the population proportion.…

A: Confidence level = 95% Sample size (n) = 2440 Sample proportion (p̂) = 0.70

Q: Assume that you want to construct a 95% confidence interval estimate of a population mean. Find an…

A: The question is about sample size estimation Given : Sample std. deviation ( s ) = 43.4 minutes…

Q: For a sampling distribution of n = 500 and population proportion of 0.48 of those who prefer cookies…

A:

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: For a confidence level of 80% with a sample size of 24, find the t-score.

A: From the provided information, Confidence level = 80% Level of significance (α) = 1 – 0.80 = 0.20…

Q: Suppose you calculate a 99% confidence interval to be: 13.05 to 20.75. Determine the margin of error

A: Given data: The given upper limit is b=20.75. The given lower limit is a=13.05.   The expression for…

Q: If n = 180 and X = 144, construct a 90% confidence interval for the population proportion, p. Give…

A: Solution: From the given information, X=144, n=180 and the confidence level is 0.90. The sample…

Q: Determine the sample size for a on-line survey with a variability of 30% and a 95% confidence…

A: Sample size n=z2(p*q)/e2

Q: If n = 15, ¯x = 50, and s = 9, construct a confidence interval at a 90% confidence level. Assume the…

A:

Q: If n=18, ¯x=x¯=34, and ss=15, construct a confidence interval at a 98% confidence level. Assume the…

A:

Q: How do you solve? ref W9Q7.

A: For Women nw=10 α=1-0.90=0.10 Degrees of freedom is obtained as- df=10-1=9 The mean and standard…

Q: The number of successes and the sample size are given for a simple random sample from a population.…

A: Obtain the value of sample proportion. The value of sample proportion is obtained below: From the…

Q: The baseball coach tracked how long it took 8 of his players to do a series of drills.  The times…

A: We have given the times recorded (in minutes) of 8 players.

Q: Assume that you want to construct a​ 95% confidence interval estimate of a population mean. Find an…

A:

Q: If n = 18, = 46, and s = 16, construct a confidence interval at a 90% confidence level. Assume the…

A:

Q: A statistics practitioner took a random sample of 55 observations from a population whose standard…

A: It is given that, Sample mean = 104. Population standard deviation, sigma is 31. The sample size, n…

Q: Construct a confidence interval of the population proportion at the given level of confidence. X =…

A:

Q: If Xbar=93​, σ=13​, and n=62​, construct a 99​% confidence interval estimate of the population​…

A: Given that  Sample size: n=62 Sample mean: x¯=93 Population standard deviation: σ=13 Confidence…

Q: If X=72​, σ=13​, and n=66​, construct a 95​% confidence interval estimate of the population​…

A:

Q: Determine tc for n = 15 and a confidence level of 99%.

A: From the given information, Sample size (n) =15, Confidence level (1-α)= 0.99 Thus, the t-critical…

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

A:

Q: Assuming that the population is normally distributed, construct a 95% confidence interval for the…

A: Given : Data I= 1 , 2 , 3 , 4 , 19 Data II = 1 , 2 , 3 , 4 , 5  Sample size = n = 5

Q: f n=19, sample mean=50, and s =8, construct a confidence interval at a 99% confidence level. Assume…

A:

Q: Assume that a sample is used to estimate a population proportion p. To find the 95% confidence…

A:

Q: f n=300 and x=60, construct a 99% confidence interval estimate for the population proportion.

A: n=300 and x=60, construct a 99% confidence interval

Q: In a survey of 2092 adults in a recent year, 748 made a New Year's resolution to eat healthier.…

A: Given data n=2092 x=748

Q: Construct a 90​% confidence interval of the population proportion using the given information.…

A: x=240  n=300  p= 240/300 = 0.8 q = 1-p = 1-0.8 = 0.2

Q: Exercise 1.4 (5pts). A farmer recorded the weights of 25 randomly selected pigs from his farm. A 95%…

A: Given problem Given that   A farmer recorded the weights of 25 randomly selected pigs from his farm.…