The salaries of the employees at four companies are summarized below. Answer the questions about them.Company A: The range of salaries is $56 000 and the mean salary is $34 000.Company B: The range of salaries is $57 000 and the mean salary is $38 000.Company C: The range of salaries is $64 000 and the mean salary is $33 000.Company D: The range of salaries is $62 000 and the mean salary is $37 000.(a) Based on the information above, which company's salaries have the least variability?O Company AO Company BO Company CO Company D(b) Based on the information above, which company has the lowest salaries on average?O Company AO Company BO Company CO Company D

Answered: Image /qna-images/answer/c6790b66-51b2-4ce7-8ab5-598dbd4b6032.jpg

Answered: (a) Based on the information above,…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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The following data show the rankings of 11 states based on expenditure per student (ranked 1 highest to 11 lowest) and student-teacher ratio (ranked 1 lowest to 11 highest). State Expenditureper Student Student-TeacherRatio Arizona 9 10 Colorado 5 8 Florida 4 6 Idaho 2 11 Iowa 6 4 Louisiana 11 3 Massachusetts 1 1 Nebraska 7 2 North Dakota 8 7 South Dakota 10 5 Washington 3 9 (a) What is the rank correlation between expenditure per student and student-teacher ratio? (Round your answer to three decimal places.) rs = At the ? = 0.05 level, does there appear to be a relationship between expenditure per student and student-teacher ratio? State the null and alternative hypotheses. H0: ρs ≥ 0Ha: ρs < 0H0: ρs ≠ 0Ha: ρs = 0 H0: ρs = 0Ha: ρs ≠ 0H0: ρs ≤ 0Ha: ρs > 0H0: ρs > 0Ha: ρs = 0 Find the value of the test statistic. (Round your answer to two decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value…
Adela Noriegam, a researcher wants to determine how employee salaries at a certain company are related to the length of employment, previous experience, and education. The researcher selects eight employees from the company and obtains the following data: Employee Salary,y Employment (in yrs), x1 Employment (in yrs), x2 Employment (in yrs), x3 A 57310 10 2 16 B 57380 5 6 16 C 54135 4 1 12 D 56985 6 5 14 E 58715 8 8 16 F 60000 20 0 12 G 59400 9 4 18 H 60720 15 7 17 What is the regression equation? Leave your answer in 2 decimal places Y = ()+() +() +
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(ii) The lecturer wishes to compare the average scores for Business Statistics between the accounting students and the finance students. He records the marks of a group of 8 students from each course in the following table. Student Accounting course Finance course 78 54 56 95 3 67 68 4 49 71 88 82 76 7 8 62 74 86 85 57 Test at 5% level of significance whether the average score for Business Statistics is different between accounting students and finance students.
estion 4 of 16 The number of text messages sent and the number of phone calls made in a sample of 100 students Identify the explanatory variable and the response variable, if possible O Either variable could be the explanatory variable because cach one could be used to predict or explain the other. O Explanatory variable: students; response variable: number of phone calls made O Explanatory variable: number of phone calls; response variable: number of text messages O Explanatory variable: number of text messages; response variable: number of phone calls O Explanatory variable: students: response variable: number of text messages DELL
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(a) Based on the information above, which company's salaries have the least variability? O Company A Company B Company C Company D (b) Based on the information above, which company has the lowest salaries on average? O Company A O Company B O Company C O Company D