A hospital would like to determine the mean length of stay for its patients sample of 17 patients revealed a sample mean of 5.7 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: Assume that the results are normally distributed. Pedro took an exam in a class in which the mean…

A: The formula for z-score is z = x - μσ where μ is the mean and σ is the standard deviation.…

Q: tribution of lifetimes of fluorescent lightbulbs. Calculate the shaded area under the curve. Express…

A: Given: Population mean time  μ=5.6 Population standard deviation  σ=1.50000 Let X ~ N(5.6, 1.50)

Q: Scores on a test have a mean of 86 and a standard deviation of 13. Jerrica has a score of 94.…

A:

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

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 268.7…

A: Mean = 268.7 Standard deviation= 13.8 days  95% confidence

Q: Suppose that 35% of all adults in a population would say "good" and 65% would say "bad" if they were…

A: Given Data: p=0.35 n=1000

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: Givensample size(n)=51Mean(x)=18.6standard deviation(s)=3.1significance level(α)=0.05

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 267.8…

A: As we know that 95% of the data values in normal distribution lies between one standard deviation…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 96.6 and a standard…

A: Standard normal distribution: The standard normal distribution is a special case of normal…

Q: Apply the central limit theorem for the distribution of a sample proportion to find the probability…

A: We have  to find probabaility of proportion.,.

Q: 1. Exercise: Medical researchers conducted a study to determine whether treadmill exercise could…

A: From the provided information,

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A:

Q: Fabienne found the standard deviation of the residuals to be 1.30. Explain this value in context.

A: The standard deviation of the residuals shows that how much the data points spread around the…

Q: The distribution of the weights of dogs at a local rescue shelter is Normal, with a mean of 38…

A:

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: Given that  μ=19x¯=18.4s=2.6n=46 Test statistic: ttest=x¯-μsn     =18.4-192.646     =-1.565

Q: The weight of newborn babies is normally distributed, with a mean of 3.7 kilograms and a standard…

A: GivenThe weight of new born babies are normally distributed.The mean =3.7 KgThe standard deviation…

Q: Pharmacist lilly  is researching how long the active ingredient in a particular drug is measured in…

A: 1.   Denote μ as the population mean time of the drug is active in the liver of people after oral…

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: for a population with a standard deviation of 5 and mean of 48, draw a bell shaped curve, marking…

A: Given data, Mean=48 sd=5 Draw a bell shaped curve?

Q: The table summarizes results from 977 pedestrian deaths that were caused by automobile accidents.…

A: Given that    Pedestrian Intoxicated Yes=A Pedestrian Intoxicated No=B Total Driver Intoxicated…

Q: Scores on a test have a mean of 8181 and a standard deviation of 1313. Michael has a score of 9393.…

A:

Q: he director of research and development is testing a new medicine. She wants to know if there is…

A: Here it is given that- Total number of samples(n) = 34 Mean(x)¯ = 320 Standard deviation(δ) = 24

Q: It takes an average of 9.1 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: The sample size is .The sample mean is .The sample standard deviation is .The significance level is…

Q: The grades on a geometry midterm at Oak have a mean of u = 74 and a standard deviation of o = 4.0.…

A: Given  mean (μ)=74 and x =70 standard deviation (σ)=4.0 Find the z-score ?

Q: It takes an average of 8 minutes for blood to begin clotting after an injury. An EMT wants to see if…

A: Solution:- from given information claim:  if the average of 8 minutes will increase if the patient…

Q: The scores on a standardized test are normally distributed with a mean of 85 and standard deviation…

A: If X be the scores. It is known- X~N85, 202 where, m: mean = 85 s: standard deviation = 20

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

A: Given that  A teacher wishes to give  A’s to the top 8%  of the students F’s to the bottom 8% of the…

Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…

A: Given: μ = 1537 σ = 315 n = 4 Formula Used: z-score = X-μσ The value of z-score is unusual if, it is…

Q: The mean test score for a history test is 63 with a standard deviation of 9. The mean test score for…

A: It is given that the mean test score and standard deviation for history test are 63 and 9, the mean…

Q: for a population with a standard deviation of 10 and mean of 100, draw a bell shaped curve, marking…

A: We have to draw bell shaped curved and marking location of the mean and standard deviation..

Q: Assume that a data for pulse rates of 50 participants is ollected. The mean pulse rate has the mean…

A: Range rule of thumb: The values are significant if it is lies within 2 standard deviations away from…

Q: Raw scores on standardized tests are often transformed for easier comparison. A test of Math ability…

A:

Q: kes an average of 13.2 minutes for blood to begin clotting after an injury. An EMT wants to see if…

A:

Q: A luxury furniture manufacture will make custom furniture for their customers. Pricing is based on…

A: The question is about normal distribution Given : Popl. avg. of time to make a custom couch ( μ ) =…

Q: According to her doctor, Mrs. Brown's cholesterol level is higher than only 15% of the females aged…

A: Z = x- μσ~ N(0,1)

Q: Dr. Shoals predicts that people who walk a mile in moderately high heels and very high heels will…

A: given data n = 27sd = 3.37standard error for difference in score = ?

Q: The weight of newborn babies is normally distributed, with a mean of 3.5 kilograms and a standard…

A: