3.The president of Doerman Distributors, Inc., believes that 30% of the firm's orders comefrom first-time customers. A random sample of 100 orders will be used to estimate the pro-portion of first-time customers.a. Assume that the president is correct and p = .30. What is the sampling distribution ofp for this study?b. What is the probability that the sample proportion i will be between 20 and 40?c. What is the probability that the sample proportion will be between .25 and .35?

Answered: Image /qna-images/answer/2b9c1c74-a75f-4a8a-8d3b-36768eeb284e.jpg

Answered: 3. The president of Doerman…

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

a.True or False: There will be more dispersion in the sampling distribution of the sample mean than in the population. b. State the standard error of the mean:
www.census.gov/newsroom/press-releases/ For each sample size in the table, give the mean and SE of the sampling distribution of p. a. sample size, n standard error, SE mean 10 100 1000 b. What happens to the mean as the sample size increases? What happens to the SE as the sample size increases? c. Complete this summary sentence: If you take a random sample of 100 people from the L.A. metro area, the expected proportion who speak a language other than English at home is give or take
4. Suppose that 15% of all students at your school ride a bicycle to class each day. Suppose further that you take a random sample of 80 students at your school. a. Is 15% number a parameter or a statistic? Explain briefly. b. Are you guaranteed that 15% of your sample ride a bicycle to class each day? Explain briefly. c. Describe the sampling distribution of the sample proportion of these 80 students who ride a bicycle to class each day. (Hint: Be sure to refer to the shape, center, and spread of this sampling distribution.) Also include a well- labeled sketch of this distribution. HCL SYstem
Movie critics claim that 68% of adults and 79% of teenagers would recommend seeing the newest action movie. Suppose random samples of 43 adults and 52 teenagers are selected. Let and be the sample proportions of adult and teenage moviegoers, respectively, who would recommend this movie. Which of the following is the mean of the sampling distribution of ? –0.11 0.11 0.74 1.47
2. What is the sample size of a certain study if the population size is 1,000,000 and 10% margin of error are expected? a.400 c,200 b.300 d.100 3.Which of the following examples is secondary data? a.Direct Interview c.journals b.Indirect or Questionnaire d.Observation
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?
2. Jim Miller works in the personnel department for a car company. He is told by his supervisor to investigate the difference in the average number of sick days between blue collar workers and whitecollar workers. So he obtained a random sample of 9 blue collar workers and a random sample of 9 white collar workers. He records the results below.At 10% level of significance, is there sufficient evidence to indicate a difference in mean sick days between blue collar workers and white collar workers.
Consider the distribution of scores of 15 students: 83, 72, 87, 79, 75, 82, 76, 77, 73, 86, 81, 79, 82, 79, 74. 6. The median score is... 7. The mean score is... 8. The mode is... 9. The given distribution is...
1. Stephen would like to check if his claim is true upon knowing that the average grade in Mathematics of his class is at least 85%. He got a sample from his classmates listed as follows: 93, 88 , 90,95 , 83, 85, 77 , 78 , 90, 80 a. What statistical tool is suited to determine if his class is true? Why? b. Assume that the distribution is normal, what would Stephen's conclusion be if the level of significance is 5%?
1.
d. Assuming a sample size of 76, what is the probability that the sampling error is within $1000. (In other words, the sample mean is within $1000 of the true mean.)
a. Identify the two different cases considered in discussing the sampling distribution of the mean sample.

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