12. FILE Scrapper Elevator Company has 20 sales representatives who sell its product throughout the United States andCanada. The number of units sold last month by each representative is listed below. Assume these sales figures to bethe population values.2 3 2 3 3 4 2 4 3 2 2 7 3 4 5 3 3 3 3 5a. Draw a graph showing the population distribution.b. Compute the mean of the population.c. Select five random samples of five each. Compute the mean of each sample. Use the methods described inthis chapter. Using a random number table (Appendix B.4) or statistical software, select the items to beincluded in the sample.d. Compare the mean of the sampling distribution of the sample mean to the population mean. Would youexpect the two values to be about the same?e. Draw a histogram of the sample means. Why are the two distributions different?requency

a.b. Mean of the population Mean of the population = (2+3+2+3+3+4+2+4+3+2+2+7+3+4+5+3+3+3+3+5) / 20…

Answered: 12. FILE Scrapper Elevator Company has…

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

2
The following data reflect the number of defects produced on an assembly line at an electronics company for the past 24 days. 1 4 4 40 2 3 1 1 5 3 3 3 1 2 4 1 3 5 a. The mean number of defects is (Round to two decimal places as needed.) 2 8 5 3 a. Compute the mean number of defects for this population of days. b. Compute the median number of defects produced for this population of days. c. Determine if there is a mode number of defects, and if so, indicate the mode value. 2 4 OB. The mode number of defects is OC. There is no mode number of defects. b. The median number of defects is (Round to two decimal places as needed.) c. If there is a mode number of defects, indicate the mode value. Select the correct choice below and fill in the answer box, if necessary, to complete your answer. OA. There is more than one mode number of defects. The modes are (Use a comma to separate answers as needed.)
1. A researcher plans to conduct a survey among students in a public high school. If the population of thisschool is 5,000, find the sample size and the percentage from the N population. (Margin of error is 5%)A = {9,10,11,7,13}B = {10,10,10,10,10}C = {1,1,10,19,19}a. Calculate the mean of each data set.b. Calculate the standard deviation of each data set.c. Which set has the largest standard deviation?
The manager of Hudson Auto Repair would like to get a better picture of the distribution of costs for new parts used in the engine tune-up jobs done in the garage. A sample of 50 customer invoices for tune-ups has been taken and the costs of parts, rounded to the nearest dollar, are listed below. 91 78 93 57 75 52 99 80 73 62 71 69 72 89 66 75 79 75 72 76 104 74 62 68 97 105 77 65 80 109 85 97 88 68 83 68 71 69 67 74 62 82 98 101 79 105 79 69 62 73 Develop a frequency distribution for these cost data. Use your own judgment to determine the number of classes and class width that provide a distribution that will be meaningful and helpful to the manager. a. Develop a stem-and-leaf display showing both the rank order and shape of the data set. (3) b. Develop a stretched stem-and-leaf display using two stems for each leading digit(s). (2) c. Which display is better at revealing the natural grouping and variation in the data? (1)
You decide that you want to make sure your estimate from part a is correct. You go out and gather 10 simple random samples of 25 people in your school and calculate the proportion of students within each sample whose Amazon packages arrive within two business days of ordering. The proportion of customers that receive their packages within two days of ordering are given below. 0.70, 0.75, 0.6, 0.95, 0.90, 0.73, 0.87, 0.86, 0.92, 0.97 Explain why all of the sample proportions are not the same.
SKIP IF YOU ALREADY DID THIS
Answer only 3, need asap.
The average final exam score for the statistics course is 43%. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is larger. The final exam scores for the 19 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 54, 38, 45, 47, 42, 42, 48, 38, 56, 51, 46, 41, 43, 41, 37, 40, 53, 43, 43 Copy to clipboard What can be concluded at the = 0.05 level of the significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? Select an answer H1: ? Select an answer c. The test statistic ? v (please show your answer to 3 decimal places.)
2. The following is the distribution of the percentage of students belonging to a certain minority groupin40 schools Percentage Frequenc 0- 4 5- 9 14 11 10-14 15-19 7 6. 20-24 a. Calculate the mean. b. Calculate the mode. c. Calculate the median. d. Calculate s² for this distribution (i) without coding; (ii) with coding. e .Calculate C.V. f. Calculate Sk.
The following data give the number of keyboards assembled at the Twentieth Century Electronics Company for a sample of 25 days. Calculate the following: 1st Decile, 28th Percentile, 7th Decile, and 85th Percentile.
8. The following table gives the winning scores in the Masters golf tournament for the years from 1973 to 2008. Use it (a) to construct a stem and leaf plot, and (b) to find the sample median of the winning scores in these years.
Answer only 2, need asap.

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