A medical researcher surveyed 9 hospitals and found that the standard deviation for the cost for removing a person's gall bladder was $51. Assume the variable is normally distributed. Based on this, find the 95% confidence intervals of the population variance and standard deviation. Round the answers to two decimal places.

Q: If these data are converted to deviation scores, the last value (15) would have a value of Y 2 9 11…

A: Solution: The mean of Y is

Q: he scores on a test have a mean of 100 and a standard deviation of 15.  If a personnel manager…

A: given data, assume the variable is normally distributed.μ=100σ=15If a personnel manager wishes to…

Q: Wyatt earned a score of 670 on Exam A that had a mean of 750 and a standard deviation of 50. He is…

A: Here both exam A and exam B are normally distributed. We need to find the marks required in exam B…

Q: If the Standard Deviation of a data set is 2.1, what is the variance of that data set? State your…

A:

Q: A quantitative data set has mean 30 and standard deviation 4. At least what percentage of the…

A:

Q: weight is the explanatory variable and has a mean of 149.4 and a standard deviation of 29.51.…

A: Let, x = Weight and y = calorie burned per minutesThe dataset is given…

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

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

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: Assume the cholesterol levels of adult American women can be described by a Normal model with a mean…

A:

Q: A data set has size of 40. How many observations lie within two standard deviations of either sides…

A: The 68-95-99.7% (Empirical) Rule: For a normal distribution, the empirical rule (68-95-99.7% Rule)…

Q: Find the standard deviation if the mean = 2, mode = 5, variance = 56 . Round your answer to three…

A: We have given that,  Mean (x̄) = 2 , mode (z) = 5 and variance        (s^2) = 56 Then,  We will find…

Q: Assume that human body temperatures are normally distributed with a mean of 98.06°F and a standard…

A: Given: Mean μ=98.06 Standard deviation σ=0.86 The above 5% people are to exceed the required…

Q: A standardized test has a pop. mean of 152 and a standard deviation of 16. Molly scores at the 91st…

A:

Q: Adult men have an average height of 69.0 inches with a standard deviation of 2.8 inches. Find the…

A: The objective of this question is to find the height of a man given the z-score, the average height,…

Q: One hundred students took a midterm exam designed to measure knowledge of statistics. Their scores…

A: Solution: Let X be the scores. From the given information, X follows normal distribution with mean…

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: Human pregnancies are normally distributed with a mean of 267 days and a standard deviation of 15…

A: The mean is 267 days and the standard deviation is 15 days.

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: Draw two normal curves that have the same mean but different standard deviations. Describe the…

A:

Q: The mean value of land and buildings per acre from a sample of properties is $11,800, with a…

A: The objective of this question is to find the range of values within which approximately 99.7% of…

Q: Find the simple standard deviation of the data. Be sure to include the screenshot of excel of your…

A: Let X: Parking Ticket fines (Canadian $)   The data is given as : X 30 15 40 40 40 30…

Q: a quantitative data set has mean 25 and standard deviation 2. approximately what percentage of the…

A: The given data is as follows:Population mean, Population standard deviation,

Q: The measurements are 465, 589, 526, 602, 486, 542, 472, 689, and 643. Find the mean and the standard…

A: obtain the mean of the data:The mean for the given data can be obtained by entering the…

Q: The earned run average of the two players is 3.7 each but the mean absolute deviation (MAD) for…

A: Mean Absolute Deviation : The MAD is the average of absolute deviations of observations from its…

Q: The manager at UPS feels that the weights of packages shipped recently are less than in he past.…

A: Given  Population mean μ=36.7, standard deviations σ=14.2, level of significance=0.01, n=64, sample…

Q: As a group, the Dutch are among the tallest people in the world. The average Dutch man is 184 cm…

A: given data normal distribution μ = 184σ = 8P(170<x<180) = ?

Q: Identify the data value corresponding to the indicated percentile. The amount of sleep an adult gets…

A: The normal distribution:A continuous random variable X is said to follow normal distribution with…

Q: The average age of class is 22.3 years. The standard deviation is 4.7 years. If the variable is…

A: Given that μ=22.3σ=4.7

Q: Elijah earned a score of 228 on Exam A that had a mean of 200 and a standard deviation of 40. He is…

A: We have to find score required in exam b.

Q: A quantitative data set has size 50. At least how many observations lie within three standard…

A: The size of the data set is 50.