A hospital would like to determine the mean length of stay for its patients having abdominal surgery. A sample of 16 patients revealed a sample mean of 6.8 days and a sample standard deviation of 1.6 days. Assume that the lengths of stay are approximately normally distributed. Find a 95% confidence interval for the mean length of stay for patients with abdominal surgery. Round the endpoints to two decimal places, if necessary

Q: The percent of fat calories that a person consumes each day is normally distributed with a mean of…

A: Solution: Let X be the average percent of fat calories. From the given information, X follows normal…

Q: Assume that adults have iq scores that are normally distributed with a mean of 100 and a standard…

A: Solution: Let X be the adults IQ score has normally distributed with mean μ=100 and standard…

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A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

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A: Given info: IQ scores are normally distributed with a mean of μ=99.2 and a standard deviation…

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A: Obtain the achievement score The achievement score is obtained below as follows:

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A: Let us assume X=score Given that X follows a normal distribution with mean= 100 and standard…

Q: 7. Final: In clinical trials a Kuwaiti drug has 45% success rate of curing a Covid-19 disease. If 13…

A: we have to find correct option for given question..

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A: Formula for the sample size needed to estimate a population mean is

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A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of 97.3 and a standard…

A: Given data Mean μ= 97.3 Standard deviation ? = 22.8 First quartile is given by Probability = 0.25

Q: How many minutes did it take him to finish the face?

A: It is given that the distribution of finishing time for men was approximately normal with mean 242…

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A:

Q: A doctor is researching the proper dosage for a patient’s cholesterol medication. The dosage of the…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.1 and a standard…

A:

Q: A successful basketball player has a height of 6 feet 5 inches, or 196 cm. Based on statistics from…

A: Solution Given the successful basketball player has a height of 6 feet 5 inches, or 196 cm. Based on…

Q: her wishes to give A’s to the top 8% of the students and F’s to the bottom 8%. The next 10% will be…

A: given: mean(μ)=78 sd(σ)=8

Q: It has been reported that the standard deviation of the speeds of drivers on interstate -35 near…

A: It has been reported that the standard deviation of the speeds of drivers is 6.8 miles per hour for…

Q: Assume that the heights of women are normally distributed with a mean of 65.4 inches and a standard…

A: We have given that  Mean=μ=65.4 Standard deviation=σ=2.7 X~Normal(μ=65.4,σ=2.7)

Q: A survey of 21 accountants finds that they spend a mean of $45.00 each week on lunch with a standard…

A: The provided data is,

Q: For a random sample of  70  overweight men, the mean of the number of pounds that they were…

A: given data  n = 70 x¯ = 28 poundsσ = 3.8 poundsbest point estimate for population mean  = ?

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A: Given data μ = 565σ = 100normal distribution P(493<x<681) = ?

Q: For a random sample of 90 overweight men, the mean number of pounds that they were overweight was…

A:

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A: Let X be the golf scores. It is given that X is normally distributed with mean 68 and standard…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 96 and a standard…

A: We have given that  Mean of 96 and a standard deviation 20.9. X~Normal(μ=96,σ=20.9)

Q: An instructor in a large lecture class found, at the end of the semester, that the total point…

A: The provided information is:

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A: Given data Mean μ = 43.5 Standard deviation σ = 3.9 95% of your customers to stay in your store.…

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A: Let "X" be the IQ score of adults. Draw the normal curve and shade the area of 0.25 to the left…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 95.6 and a standard…

A: Given: x~N(μ,σ)μ=95.6σ=24.3

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

A: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

Q: The playing life of a Sunshine radio has a Normal distribution with a mean of 600 hours and a…

A: The playing life of a radio is normally distributed with mean 600 hours and standard deviation of…

Q: Assume that adults have iq scores that are normally distributed with a mean of 98.2 and a standard…

A:

Q: Suppose that 44% of all adults think that airline travel is safer than driving. An opinion poll…

A: The information provided in the question are as follows : Sample distribution of sample proportion…

Q: Calculate z scores from two samples "he tallest living man at one time had a height of 252 cm. The…

A: Given data,Mean is μ=170.25sd is     σ=8.47

Q: Assume that adults have IQ scores that are normally distributed with a mean of 103.1 and a standard…

A: According to the given information in this questionWe need to find first quartile

Q: Assume that adults have iq scores that are normally distributed with a mean of 97.9 and a standard…

A:

Q: A radio station claims that the amount of advertising each hour has a mean of 17 minutes and a…

A:

Q: Dr. Shoals predicts that people who walk a mile in moderately high heels will have less back pain…

A: From given : n=27 x¯1=6.75x¯2=3.25SD=3.37

Q: Assume that adults have IQ scores that are normally distributed with a mean of 104.8 and a standard…

A: