In a random sample of seven people, the mean driving distance to work was 25.5 miles and the standard deviation was 5.7 m distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mea

Q: In a random sample of five mobile​ devices, the mean repair cost was ​$60.00 and the standard…

A: The summary of statistics is, x¯=60,s=11,n=5 The degree of freedom is, df=n-1   =5-1   =4 Critical…

Q: In a random sample of 26 ​people, the mean commute time to work was 34.5 minutes and the standard…

A: The random variable X follows normal distribution. The sample size is 26. The sample mean is 34.5.…

Q: In a random sample of 17 ​people, the mean commute time to work was 30.2 minutes and the standard…

A: Confidence interval give a range of plausible values for unknown parameter of the population. The…

Q: Determine the value of z, that would be used in constructing a 90%confidence interval for a 2.…

A: Z = x-μσ, Where μ = population mean,           σ = population variance,           x = observed…

Q: From a simple random sample of 400 of the 1,395 colleges in our population, it was found that…

A: Given : 1395 colleges in our population  Population Size (N) = 1395 400 colleges selected randomly…

Q: In a random sample of 60 computers, the mean repair cost was $150 with a standard deviation of $36.…

A: Solution is given below.

Q: A wildlife study is designed to find the mean weight of salmon caught by an Alaskan fishing company.…

A: Given information Standard deviation σ= 2.10 Confidence interval = 0.95 Significance level(α) = 1-…

Q: In a random sample of 27 ​people, the mean commute time to work was 33.3 minutes and the standard…

A:

Q: In a study investigating the average salaries of employees in a company, 36 employees of the company…

A: Solution: Given information: n=36 Sample size  x=2400  Sample mean s= 1200 Sample standard deviation…

Q: In a random sample of seven cell​ phones, the mean full retail price was ​$407.00 and the standard…

A: Solution: Let X bet the retail price of cell phone. From the given information, x-bar=$407, s=$196…

Q: In a random sample of ten ​people, the mean driving distance to work was 19.2 miles and the…

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Q: In a random sample of seven ​people, the mean driving distance to work was 20.2 miles and the…

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Q: In a random sample of nine people, the mean driving distance to work was 25 miles the sample…

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Q: On the Standford-Binet test, the mean IQ is 100. A class of 21 kindergarten pupils were tested with…

A:

Q: In a random sample of 8 cell phones,the mean full retail price was $405.00 and the standard…

A:

Q: In a sample of 40 water specimens taken from a construction site 26 contained detectable level of…

A: According to the provided information, sample size (N)=40 number of favorable cases (X) = 26 The…

Q: In a random sample of 12 people, the mean commute time to work was 30 minutes and the sample…

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Q: In a random sample of 20 ​people, the mean commute time to work was 31.5 minutes and the standard…

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Q: In a random sample of seven aerospace engineers, the mean monthly income was $7322 and the standard…

A: Given,sample;  n=7mean;    x¯=7322 $Standard deviation; s=343 $at confidence level 95% ,…

Q: From a population with a variance of 484, a sample of 256 items is selected. At 95% confidence, what…

A:

Q: In a random sample of 21 ​people, the mean commute time to work was 34.8 minutes and the standard…

A: given that,sample mean, x =34.8standard deviation, s =7.3sample size, n =21

Q: In a random sample of six cell phones, the mean full retail price was $432.00 and the standard…

A: Given: The population is normally distributed. Sample mean, x=432 Standard deviation, s = 203 Sample…

Q: In the 2018 GSS, a random sample of 1419 adults were asked how many hours per week they usually…

A: Given Data : Sample Size, n = 1419.0 Sample Mean, x̄ = 7.15 standard…

Q: In a random sample of 24 people, the mean commute time to work was 33.3 minutes and the standard…

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Q: In a random sample of seven people, the mean driving distance to work was 24.1 miles and the…

A:

Q: In a random sample of twelve ​people, the mean driving distance to work was 22.4 miles and the…

A: Given: n=12 , x̄=22.4 miles, S= 7.3 miles (1-α)%= 99%  1-α= 0.99 α= 0.01 α/2=0.005  df = n -1 = 12 -…

Q: During a natural gas shortage, a gas company randomly sampled residential gas meters in order to…

A: Solution: Let X be the gas consumption. From the given information, x-bar=250 cubic feet, S=50 cubic…

Q: In a random sample of seven cell​ phones, the mean full retail price was $477.50 and the standard…

A: Obtain the margin of error at the 99% confidence interval. The margin of error at the 99% confidence…

Q: Find a 95% confidence interval for the variance when a random sample of size 10 is taken from a…

A: From the given information, the sample size is 10 and the sample variance is 16.00. Given that the…

Q: In a manufacturing process, a random sample of 9 manufactured bolts has a mean length of 3 inches…

A:

Q: In a random sample of eleven people, the mean driving distance to work was 25.7 miles and the…

A: Given that, n=no. of sample=11 x=mean=25.7 s=standard deviation=4.1 Confidence interval is 99%

Q: The revenues of a sample of 15 spaza shops were recorded for the period  of March 2020.  The…

A: Given information: n=15   sample variance ( s2 ) =897 level of significance ( α )=0.01    99%…

Q: In a certain population, the number of hours per week that young people between 16 and 24 years of…

A: Given: Mean=12 Standard deviation=6

Q: In a random sample of eleven cell phones, the mean full retail price was $416.00 and the standard…

A:

Q: In a random sample of six ​people, the mean driving distance to work was 24.3 miles and the…

A:

Q: On a particular day a consumer-advice bureau received 125 calls. For a random sample of 40 of these…

A: Given:   Population size: N=125 Sample size: n=40 Sample mean: x¯=7.28 Sample standard deviation:…

Q: In a random sample of seven cell​ phones, the mean full retail price was ​$402.50 and the standard…

A:

Q: In a random sample of eight cell​ phones, the mean full retail price was ​$431.50 and the standard…

A:

Q: A sample from a normal population is given with mean 54 and the standard deviation 12. Find the…

A: Given : n = 25 x¯=54 S = 12

Q: In a random sample of 29 people, the mean commute time to work was 32.3 minutes and the standard…

A: Given: s = 7.2 n =29 X=32.3 The degrees of freedom can be calculated as: Df = n-1 = 29-1=28 The…

Q: In a randoms sample of six people, the mean driving distance to work was 19.7 miles and the standard…

A: Given, sample mean (x̄) = 19.7 sample standard deviation (s) = 6.1 sample size (n) = 6 significance…

Q: In a left-tailed hypothesis for a population mean where the population standard deviation is…

A: Each hypothesis test has two approaches to maked conclusion about them. The two approaches are p…

Q: In a random sample of 28 people, the mean commute time to work was 34.9 minutes and the standard…

A: Obtain the critical value:The required confidence level is 100*(1–α)% = 99%.The required conditions…

Q: n a random sample of 17 people, the mean commute time to work was 30.2 minutes and the standard…

A:

Q: In a random sample of ten cell phones, the mean full retail price was $554.00 and the standard…

A: Given that Sample size n = 10 Sample mean = 554.00 Sample SD = 167.00 The critical value of t at 95%…

Q: In a random sample of 38 criminals convicted of a certain​ crime, it was determined that the mean…

A: Given : n= 38.0 , x= 67.0 s= 11.0 At 95.0 % confidence level , z score= 1.96

Q: 2. A sample of seven college wrestlers had an average weight of 267 pounds with a sample standard…

A: Given that  Sample size (n)=7  Sample mean = 267  Sample standard deviation (s)= 10  We have to find…

Q: The average weight of 35 randomly compact automobiles was 2680. The sample standard deviation was…

A: From the provided information, Sample size (n) = 35 Sample mean (x̅) = 2680 Sample standard…