A statistics practitioner took a random sample of 42 observations from a population whose standard deviation is 30 and computed the sample mean to be 102. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits.   A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 90% confidence. Confidence Interval = C. Estimate the population mean with 99% confidence. Confidence Interval =

Q: Use the Student's t distribution to find tc for a 0.95 confidence level when the sample is 30.…

A:

Q: One sample of scores has a mean of M = 45 and a sample size of n = 10 scores.  A second sample of…

A:

Q: e: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the…

A: Sample size n =47 Sample mean=109 Population standard deviation =32

Q: Use the confidence interval to find the estimated margin of error. Then find the sample mean.   A…

A: The confidence interval in terms of sample mean and margin of error is defined as (x̅ ± ME), where…

Q: produce a wider confidence interval for a population mean: a 95% level of confidence or an 85% level…

A: We have to determine which confidence level is wider.

Q: You throw a ball as far as you can 5 times, recording the distance for each throw: 165 feet, 184…

A: since only 5 observation is given we will consider them as sample (n = 5)and population (N = 100)…

Q: Use the confidence interval to find the estimated margin of error. Then find the sample mean.   A…

A:

Q: Suppose you select a random sample of N=81, and find X = 50, and s = 9.9. Determine the 99%…

A: Given Mean=50 Standard deviations=9.9 n=81

Q: Use the confidence interval to find the estimated margin of error. Then find the sample mean.   A…

A:

Q: Use the confidence interval to find the estimated margin of error. Then find the sample mean. A…

A:

Q: A health researcher computed 90%, 95%, 98%, and 99% confidence intervals for the proportion of…

A: Given that a health researcher computed 90%, 95%, 98%, and 99% confidence intervals for the…

Q: You are given the sample mean and the population standard deviation. Use this information to…

A: We have given that , Mean = 145 , SD = 18.8 , Sampl size = 55 , We have to find, 90% of Confidence…

Q: You are given the sample mean and the population standard deviation. Use this information to…

A: Given Data: Confidence level - 90%: The expression for the confidence level is,

Q: The temperature of summer weather last year is normally distributed with mean 38 degrees and…

A: To find: Smallest temperature for the hottest 20% of the temperature .

Q: Use the given confidence interval to find the margin of error and the sample mean.   ​(4.65​,7.79​)…

A:

Q: n your random sample of home prices. To insert a tion" or simply copy and edit the equation in the…

A: Formula : The confidence interval formula is CI =

Q: The confidence interval for a population porportion is (0.34, 0.5). What the the sample proportion…

A: Given  The confidence interval for a population proportion (0.34,0.5)  estimate the sample…

Q: Use the confidence level and sample data to find a confidence interval for estimating the population…

A: Obtain the 98% confidence interval for the population mean. The 98% confidence interval for the…

Q: Use the confidence interval to find the estimated margin of error. Then find the sample mean. A…

A: Confidence interval is (2.5 ,3.1) Lower confidence Limit(LCL)=2.5 Upper Confidence Limit(UCL)=3.1

Q: A statistics practitioner took a random sample of 56 observations from a population whose standard…

A: We have given that,  Sample size (n) = 56, population standard deviation (σ) = 35 and sample mean…

Q: Determine the t score used for the confidence interval. Report to 3 decimal places. n 3 6 and 95%…

A: Solution: 23. From the given information, n=6 and the confidence level is 0.95.

Q: Determine the margin of error and the confidence interval for each based the data given below. Show…

A: We have given that.  1)     n = 58; x̄ = 75; σ = 10, 95% confidence interval.  2)      n = 23; x̄ =…

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

A: Given95% confidence interval N=361 x = 59.1 seconds. z= 4.9 SecondsFind the margin of error?

Q: Which of the following describes the function of a confidence interval? Select one: a. It uses a…

A: Given Options, a. It uses a sample mean to estimate the population mean b. It uses a population mean…

Q: A statistics practitioner took a random sample of 48 observations from a population whose standard…

A: sample size(n)=48 population standard deviation(σ)=25 Mean(x)=105

Q: Use the confidence interval to find the estimated margin of error. Then find the sample mean.   A…

A:

Q: A poll of 2657 U.S. adults found that 86% regularly used Facebook as a news source. Find the margin…

A: Given that, n = 2657 Point estimate = sample proportion =  = 0.86 1 -  = 1 - 0.86 = 0.14

Q: A poll of 2977 U.S. adults found that 28% regularly used Facebook as a news source. Find the margin…

A: Solution: Given information: n = 2977 Sample size  p^= 0.28  Sample proportion.

Q: A statistics practitioner took a random sample of 43 Note: For each confidence interval, enter your…

A: n = 43 standard deviation = 27 mean = 104 95% confidence interval for mean is given by  x±zα2*σn 104…

Q: Use the given confidence interval to find the margin of error and the sample mean. ​(4.63​,8.15​

A: Confidence interval is  ​(4.63​,8.15​)

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: atistics practitioner took a random sample of 49 observations from a population whose standard…

A: Sample size n =49 Sample mean=103 Population standard deviation =25

Q: Which of the following decreases the margin of error for a confidence interval? Decreasing the…

A: given data we want to decrease margin of error for a confidence interval.

Q: Determine the t score used for each confidence interval. A. n= 6 and 95% confidence B. n = 14 and…

A: (A) Obtain the t-score of the 95% confidence interval for n=6. The t-score of the 95% confidence…

Q: Use the confidence interval to find the margin of error and the sample mean.   (0.676,0.800)

A: The margin of error is the most common term which we use in a confidence interval. It is the degree…

Q: Use the confidence interval to find the margin of error and the sample mean. (1.57,1.97)

A: The objective of this question is to find the margin of error and the sample mean using the given…

Q: Which interval is wider? Choose the correct answer below. The 95% confidence interval O The 90%…

A: To construct 90% and 95% confidence intervals and answer the sub-parts.

Q: Drvals for the population mean. Interpret the results and compare the widths of the confidence…

A:

Q: Jennifer decides that she wants to know the 85 % confidence interval for a population mean despite…

A: Suppose µ is the population mean.

Q: Rosetta wants to estimate the percentage of people who rent their home. She surveys 250 individuals…

A:

Q: A statistics practitioner took a random sample of 47 observations from a population whose standard…

A: From the given information, it is clear that,  Sample mean X=99 Population standard deviation σ=27…