A company has a policy of retiring company cars; this policy looks at number of miles driven, purpose of trips, style of car and other features. The distribution of the number of months in service for the fleet of cars is bell-shaped and has a mean of 50 months and a standard deviation of 5 months. Using the Empirical Rule rule, what is the approximate percentage of cars that remain in service between 40 and 45 months?

Q: Suppose a small paint manufacturing company has a daily production that is normally distributed with…

A: Solution: It is given that a small paint manufacturing company has a daily production that is…

Q: 2. The average time spent sleeping (in hours) for a group of medical residents at a hospital can be…

A: Given that  X~N(μ= 6.1 , σ= 1) μ= 6.1 , σ= 1 Formula for Z-score Z=(X-μ)/σ

Q: Suppose that the quarterly sales levels among health care information systems companies are…

A: Given Data: Let X represent the random variable Mean=9 Standard deviation=1.1 X~ Normal (9, 1.12)…

Q: Suppose that the quarterly sales levels among health care information systems companies are…

A: Given data,Mean μ=11sd      σ=1.2P(X<x)=20%x=?

Q: The speeds of all cars on the tollway was found to be normally distributed with a mean of 63 miles…

A: It is given that that µ=63 mile per hour. Obtain the standard deviation of the speeds of all cars:

Q: According to National Health Survey heights of men are normally distributed with mean of μ=69.0…

A: The standard deviation is obtained below Critical value: From the standard normal distribution…

Q: A company has a policy of retiring company cars; this policy looks at number of miles driven,…

A:

Q: The lengths of pregnancies are normally distributed with a mean of 280 days and a standard deviation…

A:

Q: Suppose that the quarterly sales levels among health care information systems companies are…

A: Given :  μ = 10 σ = 1.1

Q: Suppose that the quarterly sales levels among health care information systems companies are…

A: given data normal distribution μ = 12σ = 1.2

Q: oby's Trucking Company determined that on an annual basis, the distance traveled per truck is…

A:

Q: What is the standard deviation of the data set 14,23,9,12,21,18,8

A:

Q: How good was Wilt Chamberlain's 1961-1962 season compared to the rest of the NBA

A: Given that How good was Wilt Chamberlain's 1961-1962 season compared to the rest of NBA Basketball…

Q: Assume that women have heights that are normally distributed with a mean of 63.6 inches and a…

A:

Q: An economist would like to estimate the mean amount of money that a family spends to within $45. If…

A: GivenMargin of Error(E)-45standard deviation(σ)=190α=1-0.93=0.07α2=0.035zα2=1.8119      (from z…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 262 days…

A:

Q: Suppose that the quarterly sales levels among health care information systems companies are…

A: Given data,Mean μ=9 million dollarssd     σ=1.1 million dollarsP(X<x)=15%x=?

Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A: we have to find given probability..

Q: In a recent awards ceremony the age of the winner for the best actor award was 34 and the age of the…

A:

Q: Suppose that the quarterly sales levels among health care information systems companies are…

A: mean=8 standard deviation=1.1

Q: Suppose the scores of students on an exam are normally distributed with a mean of 454 and a standard…

A:

Q: Suppose that the quarterly sales levels among health care information systems companies are…

A:

Q: At Center Hospital there is some concern about the high turnover of nurses. A survey was done to…

A: Given data for 20 nurses were as follows. 5, 8, 10, 11, 11, 14, 15, 17, 23, 26, 26, 28, 29, 30, 31,…

Q: Sketch the distribution of heights. What percentage of students are over 73.38 inches tall? What…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Suppose that the quarterly sales levels among health care information systems companies are…

A: Given Information: Suppose that the quarterly sales levels among health care information systems…

Q: The mean gas mileage for cars driven by the students at Chillville High School is 28.0 miles per…

A:

Q: At Center Hospital there is some concern about the high turnover of nurses. A survey was done to…

A: Data:3, 6, 8, 9, 9 12, 13, 15, 21, 24, 24, 26, 27, 28, 29, 30, 32, 37, 37, 43 Using online…

Q: The length of pregnancies are normally distributed with mean of 268 days and a standard deviation of…

A: Given : Length of pregnancies = X  X is normally distributed  Mean of X = 268 days  Standard…

Q: The mean gas mileage for cars driven by the students at Chillville High Schoo is 28.0 miles per…

A: Normal distribution is continuous distribution which has many real life applications. Standard…

Q: Suppose that the quarterly sales levels among health care information systems companies are…

A: Solution

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 270 days…

A: Let "X" be the lengths of pregnancies in a small rural village in days.

Q: Suppose that the quarterly sales levels among health care information systems companies are…

A: Given information- Population mean µ = 8 million Standard deviation σ = 1.1 million Z = -1.2816…

Q: Suppose that the quarterly sales levels among health care information systems companies are…

A: The objective of this question is to find the sales level that separates the bottom 15% of all…

Q: Suppose that the quarterly sales levels among healthcare information systems companies are…

A:

Q: . Average annual expense of a middle-income household living in Afghanistan is 360,000 Afghani with…

A: Given, Mean μ = 360000Standard deviation σ = 4000sample size n = 1500

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A: It is given that the mean is 50 seconds and standard deviation is 8 seconds.

Q: Suppose the scores of students on an exam are normally distributed with a mean of 558 and a standard…

A:

Q: An economist would like to estimate the mean amount of money that a family spends to within $36. If…

A: Given that  Population standard deviation =200 Margin of error =E =36 91% confidence.

Q: Considering salary of employee's in a company, the mean salary of managers is $102,000 per year.  Is…

A: Considering salary of employee's in a company, the mean salary of managers is $102,000 per year.…

Q: A company has a policy of retiring company cars; this policy looks at number of miles driven,…

A: Given:  Mean = 52 Standard deviation = 4

Q: Compute standard deviation for the following data : 5, 8, 7, 11, 9, 10, 8, 2, 4, 6.

A:

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.