A particular magazine identified the top accounting firms in 8 geographic regions across a certain country. Even though all 8 regions reported growth in the past year,region A and region B reported the highest combined growths, with 17% and 25%, respectively. A characteristic description of the accounting firms in these regionsincluded the number of partners in the firm. The accompanying table contains data on the number of partners. Complete parts (a) through (d) below.E Click on the icon to view the data table.IMPORTANT NOTE: In all of these questions, there are 2 possible ratios A/B and B/AI Our convention is to always assume that the larger variance is in thenumerator (i.e., on top). The correct answer will always be found in this fashion. Similarly, in questions about a critical value, we shall consider the right(upper) tail.a. At the 0.01 level of significance, is there evidence of a difference in the variability in numbers of partners for region A accounting firms and region B accounting firms?Determine the hypotheses, where of is the population variance of the numbers of partners for region A accounting firms and of is the population variance of thenumbers of partners for region B acounting firms. Choose the correct answer below.OB. Hy of toH, of oOD. Hi o soOA.Hy of 20;O C. H of -

We want to tell the null hypothesis and alternate hypothesis

Answered: a. At the 0.01 level of significance,…

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

Are nursing salaries in City A lower than those in City B? As reported by a newspaper, salary data show staff nurses in City A earn less than staff nurses in City B. Suppose that in a follow-up study of 40 staff nurses in City A and 50 staff nurses in City B you obtain the following results. Assume population variances are unknown and unequal. City A City B n1 = 40 n2 50 X1 = $56,600 x2 = $59,500 S1 = $6,000 S2 = $7,000 (a) Formulate hypotheses so that, if the null hypothesis is rejected, we can conclude that salaries for staff nurses in City A are significantly lower than for those in City B. Use a = 0.05. Ho: H1 - 42 # 0 Ha: H1 - H2 = 0 Hoi Hq- Hz = 0 Hai M1- Hz 0 Ha: H1 - H2 = 0 Ho: H1 - 42 s0 Ha: H1 - H2 > 0 Ho: H1 - H2 < 0 Ha: H1 - 42 + 0 (b) What is the value of the test statistic? (Round your answer to three decimal places.) (c) What is the p-value? The degrees of freedom for this test are 87. (Round your answer to four decimal places.) p-value (d) What is your conclusion? Do…
A Pearson correlation coefficient is calculated for 38 individuals. What value is df should be used to determine statistical significance in hypothesis tesing? a. 35 b. 36 c. 37 d. 38
A researcher wants to determine if the number of years of education for a parent correlates with the number of years of education for their child. The table shows the number of years of education of the parent and the number of years of education of their child for a random sample of 7. Years of Education of Parent 13 9 12 10 12 10 12 Years of Educations of their Child 15 11 10 16 17 12 17 Conduct a hypothesis test to determine if there is a significant linear correlation between the two variables. Use α = 0.05. What is the critical value for this hypothesis test? A researcher wants to determine if the number of years of education for a parent correlates with the number of years of education for their child. The table shows the number of years of education of the parent and the number of years of education of their child for a random sample of 7. Years of Education of Parent 13 9 12 10 12 10 12 Years of Educations of their Child 15 11 10 16 17 12 17…
1. 2. 4. 1. 2. The distribution of a sample of 100 test scores is mound-shaped and symmetrical, with a mean of 50 and a variance of 144. 3. a) b) c) 4. d) 3. a) a) A sample of 200 people were given a test. The distribution of the test scores was mound- shaped and symmetrical with a mean of 100. One person, whose test score was 125, was found to be at the 84th percentile. b) d) Answers: b) Approximately how many scores are equal to or greater than 74? What score corresponds to the 75th percentile? If the lowest and highest scores in this sample are 14 and 89, respectively, what is the range of the scores in standard deviation units? b) Assume that the 100 test scores still have a mean of 50 and a variance of 144, but now have a strongly negatively skewed distribution. At least how many of the scores fall between 32 and 68 in this distribution? What is the Z-score of a person whose test score is 70? Approximately how many people obtained scores greater than 135? Approximately how many…
Before a random sample has been drawn, which of the following is true? I. The sample average is a random variable. II. The sample average is a constant. II. The sample average has a variance of zero. Il and III only. III only. I only. I and Il only. Il only.
A Hollywood studio believes that a movie that is considered a drama will draw a larger crowd on average than a movie that is considered a comedy. To test this theory, the studio randomly selects several movies that are classified as dramas and several movies that are classified as comedies and determines the box office revenue for each movie. The results of the survey are as follows. Assume that the population variances are approximately equal. Box Office Revenues (Millions of Dollars) n Drama 10 160 30 Comedy 15 140 10 Copy Data Calculate a 99 % confidence interval for the difference in mean revenue at the box office for drama and comedy movies. Let dramas be Population 1 and comedies be Population 2. Write your answer using interval notation and round the interval endpoints to two decimal places.
If an analysis of variance is used for the following data, what would be the effect of changing the value of M 2 to 25? Sample Data M1 = 10 M2 = 20 SS1 = 90 SS2 = 70 a. an increase in SSbetween and an increase in the F-ratio b. a decrease in SSbetween and an increase in the F-ratio c. an increase in SSbetween and a decrease in the F-ratio d. a decrease in SSbetween and a decrease in the F-ratio
If the variance is 64, then what will be the value of o? O a. 4096 O b. 128 Oc.8 O d. 32
The results of a two-factor analysis of variance produce df = 2, 36 for the F-ratio for factor A and df = 2, 36 for the F-ratio for factor B. How many participants are in each of the treatment conditions? A.) 4 B.) 5 C.) 6 D.) 10
If the correlation coefficient value for the two variables is 0.865 with sample size 15 each. What is the value of the test statistic, to test the significance of the correlation? a) b) c) d) 4.221 5.221 6.216 7.221 Answer A. B.
Which of the following statements are TRUE for Mann-Whitney U test? I. Data is normally distributed II. Can only be used to test two groups III. Converted into ranks IV. No assumption on variances homogeneity a. I, II, III & IV b. II, III & IV c. I, II & III d. II & III
. If one sample has n = 5 scores with SS = 40 and a second sample has n = 5 scores with SS = 20, then what is the pooled variance

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