The average number of defective parts manufactured during a shift at a technology factory is supposed to be under 30 defectives a shift.  Shift A averages 28.6 defectives per shift with a standard deviation of 5.6 defectives. Shift B averages 26 defectives per shift with a standard deviation of 2.4 defectives. Shift C averages 25 defectives per shift with a standard deviation of 8.4 defectives.  Which shift appears to be doing the best job?

Q: Suppose weights of the checked baggage of airline passengers follow a nearly normal distribution…

A: Let X be the random variable from normal distribution with mean (μ) = 45 pounds and standard…

Q: 1) A company reports that the mean weight of yearling Angus steers is 1152 pounds with a standard…

A: We have given that  X~N(mu, sigma^2) mu=1152 ,sigma =84 Z-score =(x-mu )/sigma    Note :-According…

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: 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: Keenan scored 80 points on an exam that had a mean score of 77 points and a standard deviation of…

A:

Q: The studernt scored the same on both tests. O B. The student scored better on the mathematics test.…

A: Given : For geography test student score, x = 68.0 population mean, μ = 80.0…

Q: Scores by women on the SAT-1 test are normally distributed with a mean of 988 and a standard…

A: Given Information Now we have to calculate corresponding Z value                         Z = 0.7388…

Q: Doug has 1,000 bottle caps in his collection compared to Melissa's 2000 bottle caps. If the average…

A: Given,mean(μ)=1250standard deviation(σ)=500Doug bottle cap collection(X)=1000Melissa's bottle cap…

Q: Two different species of trees have heights that are approximately normal in distribution.  Tree A…

A: The z-score of a random variable x is defined as follows: z = (x – µ)/σ. Here, µ and σ are the mean…

Q: Goop Inc needs to order a raw material to make a special polymer.  The demand for the polymer is…

A: According to the given information,And let order quantity (Q) = 450 gallons.

Q: manufacturer makes bags of popcorn and bags of potato chips. The average weight of a bag of popcorn…

A:

Q: A manufacturer makes bags of popcorn and bags of potato chips. The average weight of a bag of…

A: The question seems to involve the concept of standard deviation, which is a measure of the amount of…

Q: he average number of Hate Crimes in the United States per year (1991 to 2018) is approximately 7900…

A: Given: Population mean μ=7900 Population standard deviation σ=1200 X ~ N (7900, 12002 )

Q: Katherine earned a score of 1000 on Exam A that had a mean of 700 and a standard deviation of 100.…

A: Here we need to find the score for Katherine in exam B such that it's equivalent to the score for…

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

A: Here we need to find the mean, median and mode for the given normal distribution. Also we need to…

Q: Each year students in a local school district write a national examination. The average on this…

A: Average of a dataset is the mean value of the observations in the data and it is computed by…

Q: A study conducted by the Center for Population Economics at the University of Chicago studied the…

A:

Q: Two friends, Karen and Jodi, work different shifts for the same ambulance service. They wonder if…

A: We have,

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: Mountain Mouse makes freeze-dried meals for hikers. One of Mountain Mouse's biggest customers is a…

A: From the above given data the following solution is provided below:

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: ter and a standard deviation of 25 milligrams per deciliter. What cholesterol level separates the…

A: mean = 215 standard deviation = 25 What cholesterol level separates the lowest 10​% from the highest…

Q: A cohort of patients have lost on average 23 pounds and the standard deviation of the sample is 1.2…

A: We have been given that a cohort of patients have lost on average 23 pounds and the standard…

Q: Lazurus Steel Corporation produces iron rods that are supposed to be 36 inches long. The machine…

A:

Q: Claire earned a score of 96 on Exam A that had a mean of 100 and a standard deviation of 10. She is…

A: Here Claire scores 96 for exam A. We need to find the mark equivalent to exam A for exam B. Given…

Q: Americans (on average) individually eat 16 pounds of seafood each year with a standard deviation of…

A: Given that   x̄ = 14 , μ = 16 , ? = 7 , n = 4

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

A: Solution

Q: A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what…

A: Given that mean=15 and standard deviation = 2 Let, X= number of hours spent by a student in the…

Q: The Richard family has twins Ron and Rebecca. Both Ron and Rebecca graduated from college 2 years…

A: Let X for  Ron earning from college 2 years ago X=$60,000, μx=$70,000, σx=$5,000Y=$60,000,…

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

A:

Q: 2. Let Y denote the average starting salary for 2014 U.S. college graduates, measured in dollars.…

A:

Q: Morgan earned a score of 275 on Exam A that had a mean of 300 and a standard deviation of 25. She is…

A:

Q: Addison earned a score of 390 on Exam A that had a mean of 450 and a standard deviation of 25. She…

A:

Q: A local firm reported that an American family of four washes an average of 2000 pounds of clothes…

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: Layla earned a score of 140 on Exam A that had a mean of 200 and a standard deviation of 50. She is…

A: Given :  Score on exam A = X = 140  mean of X =  200  standard deviation of X =  50. Score on exam B…

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

A:

Q: Most water treatment facilities monitor the quality of their drinking water on an hourly basis. One…

A: Given that sample size is 49, sample mean is 8.42 and sample standard deviation is 0.16.

Q: Christian earned a score of 80 on Exam A that had a mean of 200 and a standard deviation of 40. He…

A: Here we need to compute the marks Christian must obtain in exam B such that it's equivalent to exam…

Q: In what range would you expect to find the middle 95% of hate crimes per year? Between Incorrect and…

A: The random variable X is defined as the number of Hate Crimes in the United States which follows…

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

A:

Q: Who has the larger dog relative to their breed?

A: It is given that For Golden Retriever, X = 70.2, mean = 67 and SD = 2.5 For St Bernard, X = 215,…