One step in the manufacture of a certain metal clamp involves the drilling of fourholes. In a sample of 100 clamps, the average time needed to complete this step was 80 seconds and the standard deviation was 15 seconds.

Q: The diameter of holes for a cable harness is known to have a normal distribution with a star…

A: Given information: Population standard deviation is 0.01. A random sample of size 10 yields an…

Q: The average salary of 64 employee was 5400. Using historical data, we will assume that the…

A: Given,sample size(n)=64mean(X¯)=5400standard deviation(σ)=260α=1-0.95=0.05α2=0.025Z0.025=1.96…

Q: The mayor is interested in finding a 95% confidence interval for the mean number of pounds of trash…

A: Sample mean = x̅ = 37.4     Sample size = n = 236     Sample S.D = s = 6.4       Standard…

Q: the standard deviation of the 16 observations was 0.95 inches (again, the sample mean was 17.2).…

A: Given :  Standard deviation of the 16 observations was 0.95 inches & the sample mean was 17.2.…

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 five people, the mean driving distance to work was 19.9 miles and the standard…

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Q: Find the 2-decimal answers for a 96% confidence interval if a samle of 56 students have a mean…

A: From the provided information, Population standard deviation (σ) = 2.35 Sample mean (x̄) = 51 Sample…

Q: In a random sample of five people, the mean driving distance to work was 19.9 miles and the standard…

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Q: Noise levels in a hospital were measured at 81 different locations. The average level was found to…

A: It is given that, Sample mean = 61.2 decibels. Sample standard deviation, s is 7.9 decibels. The…

Q: In a random sample of seven people, the mean driving distance to work was 19.7 miles and the st and…

A: From provided information, random sample of 7 people is considered. The mean distance to work was…

Q: Find the minimum sample size needed to construct 90% confidence interval for the population mean…

A: Standard deviation can find using range rule of thumb

Q: interested in the true mean age for Winter Foothill College students. Let X = the age of a Winter…

A: Given : Sample Size , n= 25 Sample Mean , x̄ =30.4 population standard deviation ,…

Q: 17. A meteorologist who samples 13 thunderstorms found that the average speed at which they…

A:

Q: In a random sample of six mobile​ devices, the mean repair cost was ​$75.00 and the standard…

A: Obtain the critical value: The level of confidence is 1- α = 0.99. The sample size is n = 6. The…

Q: The capacities (in ampere-hours) were measured for a sample of 120 batteries. The average was 178…

A:

Q: In a random sample of four mobile devices, the mean repair cost was $70.00 and the standard…

A: sample size(n)=4Mean()=70.00standard deviation(s)=13.50confidence level=95%

Q: In a random sample of 39 criminals convicted of a certain​ crime, it was determined that the mean…

A: From the provided information, Sample size (n) = 39 Sample mean (x̅) = 53 Sample standard deviation…

Q: The average sa!lary of 64 employee was 5400 and the sample standard deviation was 260. Find the 95%…

A: Solution

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

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Q: A fitness center is interested in finding a 98% confidence interval for the mean number of days per…

A:

Q: The average salary of 64 employee was 5400 and the sample standard deviation was 270. Find the 90%…

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Q: in a nigh school, the average class size of nine math class was 26.1 with a standard deviation of…

A: We have given that,  Sample mean (x̄) = 26.1, standard deviation (s) = 6.21 and sample size (n) = 9…

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

A: From the provided information, Sample size (n) = 6 Sample mean (x̄) = 19.2 Sample standard deviation…

Q: A sample of 169 observations showed an average of 15 and a standard deviation of 26. Construct the…

A: Since the population standard deviation is unknown, t distribution can be used for the computation…

Q: The mean time taken to design a house plan by 40 architects was found to be 19 hours with a standard…

A: Step 1:Given data :Sample size n=40degrees of freedom df=40−1=39Sample mean xˉ=19Sample standard…

Q: The average salary of 64 employee was 5400. Using historical data, we will assume that the…

A: Given; Number of employee = 64 Average salary=5400 Standard deviation = 280.

Q: A fitness center is interested in finding a 98% confidence interval for the mean number of days per…

A:

Q: In a random sample of five people, the mean driving distance to work was 22.5 miles and the standard…

A:

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

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Q: 3. A sample of 8 adult elephants had an average weight of 12,300 pounds. The standard deviation for…

A:

Q: A hotel chain wants to estimate the average number of conference rooms rented daily in each month.…

A: The question is about confidence interval Given : Popl. std. deviation of conf. rented daily ( σ ) =…

Q: for a sample of 150 that has a mean of 6540 and a standard deviation of .89, calculate the 95%…

A: It is given that mean and standard deviation are 6,540 and 0.89, respectively.

Q: A fitness center is interested in finding a 90% confidence interval for the mean number of days per…

A: Given : Records of 266 members were looked at and their mean number of visits per week was 3.3 and…

Q: Past experience has indicated that the breaking strength of yarn used in manufacturing drapery…

A: Given:

Q: On average, the level of radioactivity was 198.2 gammas. The standard deviation was 3.3 gammas.…

A: Given information Sample size n = 10 Sample mean x̅ = 200 Population standard deviation = 3.3…

Q: (a) Click on "Take Sample" to see the results from your random sample of 35 Dorset sheep. Sample…

A: a) Sample size , n = 35 The point estimate of the sample is the sample mean which is equal to the…

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

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Q: In a random sample of eight people, the mean driving distance to work was 24.2 miles and the…

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Q: 1. The strength of a fiber is normally distributed with a known population standard deviation of 12…

A: Here since the population standard deviation is given we use the Z value for the computation of…

Q: A sample of 19 heads of lettuce was selected. Assume that the population distribution of head weight…

A: Given that the sample size, n=19, mean weight, x¯=2.91  pound, and standard deviation, s=0.65 pound.…

Q: na random sample of 41 criminals convicted of a certain crime, it was determined that the mean…

A: Given that mean =62 ,s.d =11 ,n =41

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.