Assume that the heights of adult males (in inches) in the Sultanate of Oman are normally distributed on average. The mean length of a random sample of 25 adult Omani males is 69.72 inches, and the standard deviation is 4.15. My 90% confidence interval is:

Q: Assuming normality, construct the requested confidence interval. A sociologist is interested in the…

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Q: How large a sample should be selected to provide a 90% confidence interval with a margin of error of…

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Q: The number of cars sold annually by used car salespeople is normally distributed with a standard…

A: Given, Standard Deviation =σ=4.7Sample size =n = 47Mean = x=28

Q: Walleyes found in lake Windermere have a mean length of 18.4 inches with a standard deviation of 4.2…

A:

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: were found to have an average weight of 9.7 ounces with a sample standard deviation is 0.20. Find…

A: As the population standard deviation is not known, we will use t distribution. Degrees of freedom…

Q: The grade point averages for a sample of 10 randomly selected junior college students have an…

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Q: The mean and the standard deviation of a normal population are 11,795 and 14054 respectively. If n=…

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Q: Salaries of 33 college graduates who took a statistics course in college have a mean, x, of $69,000.…

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…

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: A local police department made an effort to determine the average speed of automobiles travelling…

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Q: In a random sample of twelve ​people, the mean driving distance to work was 21.5 miles and the…

A: Solution

Q: In a random sample of 15 ​people, the mean driving distance to work was 18.5 miles and the standard…

A:

Q: In a survey, 45 people were asked how much they spent on their last partners birthday gift. The…

A: Given information- Sample size, n = 45 Significance level, α = 0.10 Sample mean, x-bar = $90 Sample…

Q: Do male and female servers at Swank Bar work the same number of hours? A sample of 60 female servers…

A: The objective of this question is to determine whether male and female servers at Swank Bar work the…

Q: he average weight of 20 randomly selected cars was 3500 pounds. The sample standard deviation was…

A: given data, n=20df=n-1=20-1=19x¯=3500 pounds s=315 pounds CI=0.90α=1-0.90=0.10

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: A survey found that​ women's heights are normally distributed with a mean62.2in. and standard…

A: It was stated that a survey found that​ women's heights are normally distributed with a mean62.2in.…

Q: The average length of time it takes to read a book can differ from one generation to another.…

A: Population standard deviation ()= 2.2population mean ()= 17sample mean  = 16.1sample size (n) = 50It…

Q: A sample of 14 commuters in Cebu showed the average of the commuting times was 33.2 minutes. If the…

A: Sample size : n=14 Sample mean : x¯=33.2 Sample standard deviation : s=8.3 Confidence level :…

Q: A study was commissioned to find the mean weight of the residents in certain town. The study…

A: Given: n=58, x=174 and s=38. Now,Degrees of freedom=n-1=58-1=57 Then, at 95% confidence level, the…

Q: The mean length of all the telephone calls would have to be estimated. In sample of 14 calls, the…

A: Given:

Q: C. Find a 95% confidence interval for the average life time of all the television sets produced by a…

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Q: A large urgent care center with 4 doctors found that they can see an average of 28 patients per…

A: We have given that Sample size (n) = 41Sample mean (x̅) = 28Standard deviations (s) =…

Q: Salaries of 33 college graduates who took a statistics course in college have a mean, x, of $68,000.…

A:

Q: Suppose that textbook weights are normally distributed. You measure 44 textbooks' weights, and find…

A: Sample size=n=44 Sample mean=50 ounces Population standard deviations=11.2 Alpha=0.01

Q: In a random sample of ten people, the mean driving distance to work was 21.8 miles and the standard…

A: Given,sample size(n)=10mean(x)=21.8standard deviation(σ)=6.4α=1-0.99=0.01α2=0.005degrees of…

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: 13 squirrels were found to have an average weight of 790 grams with a sample standard deviation of…

A: Given that  n=13 , Mean=X̄=790 , Standard deviation=S=8.3 95% confidence interval

Q: In a random sample of  eight cell​ phones, the mean full retail price was ​$468.50 and the standard…

A: The information provided in the question are as follows :- Sample size (n) = 8 Sample mean (x̄) =…

Q: The ICU Admission dataset includes a variable indicating the age of the patient. Find and interpret…

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

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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: The prices of used books at a large college bookstore are normally distributed. If a sample of 23…

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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: Fifteen randomly selected women were asked to workout on a​ stair-master for three minutes. After…

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Q: A popular weight loss program claims users will lose weight each month. Linda samples 25 dieters and…

A: We have given that,  Sample mean (x̄) = 10 pounds, standard deviation (s) = 2 pounds and sample size…

Q: In a sample of 15 small candles, the weight is found to be 3.72 ounces with a standard deviation of…

A: It is given that,Sample mean = 3.72 ounces.Sample standard deviation, s is 0.963 ounces.The sample…

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

A:

Q: n a random sample of six mobile​ devices, the mean repair cost was $65.00 and the standard deviation…

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Q: le of 16 ten-year-old girls had a mean weight of 71.5 and a standard deviation of 12 pounds,…

A: Confidence interval: It is defined as the range that contains the value of the true population…

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.