Question 6A manufacturer produces, packages, and sells packs of their product targeted to weigh 50 grams. A qualitycontrol manager working for the company was concerned that the variation in the actual weights of thetargeted 50-gram packs was larger than acceptable. That is, he was concerned that some packs weighedsignificantly less than 50-grams and some weighed significantly more than 50 grams. In an attempt toestimate the standard deviation of the weights of all of the 50-gram packs the manufacturer makes, hetook a random sample of 21 packs off of the factory line. The random sample yielded the sample mean49.86 grams and the standard deviation of 0.655 grams. Use the random sample to derive a 99% confidenceinterval for the variance (standard deviation) of the actual weights of the packs.Note: if the normality plot is not provided you may assume that the actual weights of the packs arenormally distributed.i. Procedure:Select an answerSelect an answerOne mean Z procedureOne variance x² procedureOne mean T procedureOne proportion Z procedureii. Assumptions: (select everything that applies)Simple random sampleThe number of positive and negative responses are both greater than 10Population standard deviation is unknownSample size is greater than 30Normal populationO Population standard deviation is knowniii. Unknown parameter: Select an answerSelect an answerp, population proportionμ, population meano², population variance

Given that Sample size n =21 Sample mean=49.86 Standard deviation =0.655

Answered: anufacturer produces, packages, and…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

The speed of cars driving past Johnson City High School, on 666 Reynolds Rd, were recorded over one school year. The speed limit on that part of Reynolds Rd is 20 mph. The mean of the speed readings was 24.19 mph, with a standard deviation of 3.56 mph.
Yoko, who turns eighty years old this year, has just learned about blood pressure problems in the elderly and is interested in how her blood pressure compares to those of her peers. She has uncovered an article in a scientific journal that reports that the mean systolic blood pressure measurement for women over seventy-five is 133.9 mmHg, with a standard deviation of 5.9 mmHg. Assume that the article reported correct information. Complete the following statements about the distribution of systolic blood pressure measurements for women over seventy-five. (a) According to Chebyshev's theorem, at least (Choose one) ▼ of the measurements lie between 122.1 mmHg and 145.7 mmHg. (b) According to Chebyshev's theorem, at least (Choose one) measurements lie between 116.2 mmHg and 151.6 mmHg. ▼ of the X
The weights of tablets are normally distributed with mean 254 mg and standard deviation 4 mg. If exactly 1% of tablets are ‘overweight’, then what weight makes the tablet ‘overweight’?
To compare the dry braking distances from 30 to 0 miles per hour for two makes of automobiles, a safety engineer conducts braking tests for 35 models of Make A and 35 models of Make B. The mean braking distance for Make A is 42 feet. Assume the population standard deviation is 4.7 feet. The mean braking distance for Make B is 45 feet. Assume the population standard deviation is 4.4 feet. At a = 0.10, can the engineer support the claim that the mean braking distances are different for the two makes of automobiles? Assume the samples are random and independent, and the populations are normally distributed. Complete parts (a) rari rz (b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is/are (Round to three decimal places as needed. Use a comma to separate answers as needed.)
The chocolate chip cookies that are produced at Perry’s Cookie Emporium have weights which are approximately normally distributed with the mean weight 180 grams and with standard deviations 20 grams. The cookies, however, are sold by count, not by weight. Perry wants to improve his image, so he decides to set aside lightest 20% of the cookies to be packaged and sold separately. What cookie weight will divide the lightest 20% from the heaviest 80%?
A particular fruit's weights are normally distributed, with a mean of 609 grams and a standard deviation of 40 grams.The heaviest 20% of fruits weigh more than how many grams?Give your answer to the nearest gram.
An environmental researcher took 30 water samples from different areas of a lake. He measured the pH level of each water sample. The standard deviation for the 30 pH levels was about 1.4.What is the best interpretation of the standard deviation? The pH level of a typical water sample was about 1.4 units from the mean on average. The difference between the minimum and maximum pH levels was about 1.4 units. The entire lake had a pH level that was about 1.4 units. The pH level of any given water sample was about 1.4 units from the mean. - this one is wrong
A particular fruit's weights are normally distributed, with a mean of 777 grams and a standard deviation of 9 grams.The heaviest 10% of fruits weigh more than how many grams?Give your answer to the nearest gram.
A study reported that the mean concentration of ammonium in water wells in the state of Iowa was 0.71 milligram per liter, and the standard deviation was 1.09 milligrams per liter. Is it possible to determine whether these concentrations are approximately normally distributed. If so, say whether they are normally distributed, and explain how you know. If not, describe the additional information you would need to determine whether they are normally distributed.
The heights of adult men in America are normally distributed, with a mean of 69.6 inches and a standa deviation of 2.61 inches. The heights of adult women in America are also normally distributed, but with mean of 64.7 inches and a standard deviation of 2.56 inches. If a man is 6 feet 3 inches tall, what is his Z-score (to two decimal places)?
The board of examiners that administers the real estate broker’s examination in a certain state found that the mean score on the test was 450 and the standard deviation was 50. If the board wants to set the passing scores so that only the top 5% of all applicants pass, what should the passing score be? Assume that the scores are normally distributed.
Willow Road and Arroyo Seco are schools in different states. The heights of students at Willow Road have a population mean of 50.4 inches and a standard deviation of 6 inches. The heights of students at Arroyo Seco have a population mean of 54.3 inches with a standard deviation of 2.3 inches. For each school, the distribution of the heights of students is clearly bell-shaped.Elsa is a student at Willow Road and is 67 inches tall. Jane is a student at Arroyo Seco and is 59 inches tall.

SEE MORE QUESTIONS

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS