The salaries of the employees at four companies are summarized below. Answer the questions about them.Company A: The mean salary is $32,000 and the range of salaries is $50,000.Company B: The mean salary is $23,000 and the range of salaries is $51,000.Company C: The mean salary is $24,000 and the range of salaries is $56,000,Company D: The mean salary is $27,000 and the range of salaries is $54,000.(a) Based on the information above, which company's salaries have the most variability?○ Company A○ Company BO Company Cх○ Company D(b) Based on the information above, which company has the lowest salaries on average?○ Company AO Company BO Company C○ Company D

The objective of the question is to determine which company has the most variability in salaries and…

Answered: The salaries of the employees at four…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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B. The average exam score for 10 students in a statistics class was 85. One student dropped the class, changing the average exam score of the remaining students to 90. What was the exam score of the student who dropped the class?
A statistics instructor would like to know whether it is worthwhile to require students to do weekly homework assignments. For one section of the statistics course, homework is assigned, collected and graded each week. For another section, the same problems are suggested each week, but the students are not required to turn in their homework. At the end of the semester, all students take the same final exam. The score distribution for the two sections are as follows: With Homework 12 15 17 5 10 No Homework 12 21 28 25 14 Do these data indicate a significant difference between the score distributions for students with homework versus students with no homework? Test at the 5% level of significance.
The following refer to the following data set: 92.2 119.4 119.4 72.8 88.2 119.4 88.9 99.6 109.4 96 What is the arithmetic mean of this data set? mean = What is the median of this data set? median = What is the mode of this data set? mode
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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 A O Company B O Company C O 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
I can't understand why the data is the percentage of surveyed parents.
The Census Bureau Web site gives several choices for "average income" in its historical income data. In 2006, the median income of American households was $48,201. The mean household income was $66,570. The median income of families was $58,407, and the mean family income was $77,315. The Census Bureau says, “Households consist of all people who occupy a housing unit. The term ‘family’ refers to a group of two or more people related by birth, marriage, or adoption who reside together.” Identify the reason for mean incomes for households being higher than median incomes for households.
A statistics instructor would like to know whether it is worthwhile to require students to do weekly homework assignments. For one section of the statistics course, homework is assigned, collected and graded each week. For another section, the same problems are suggested each week, but the students are not required to turn in their homework. At the end of the semester, all students take the same final exam. The score distribution for the two sections are as follows: With Homework 12 15 17 5 10 No Homework 12 21 28 25 14 Do these data indicate a significant difference between the score distributions for students with homework versus students with no homework? Test at the 5% level of significance.
The Computer Anxiety Rating Scale (CARS) measures an individual’s level of computer anxiety, on a scale from 20 (no anxiety) to 100 (highest level of anxiety). Researchers at a large university administered CARS to 80 business students. One of the objectives of the study was to determine whether there is a difference between the level of computer anxiety experienced by female students and male students. Of the 80 student survey takers, 40 were male, 40 were female. The results are in the table below for statistical analysis of variability between the two samples. All of these analyses are run with a 95% level of confidence. Males Females Sample Mean 40.26 36.85 Sample Standard Deviation 13.35 9.42 Perform the test chosen in part (d) of the previous problem and supply this information: a. What is the value of the test statistic? b. Find the probability of getting these results if there is no difference in anxiety ratings between the…
The low temperatures in the Town of Rigby for 5 conservative days were -12, -17,-11,-12,-18 what was the mean low temperature for five days
A company has 30 employees, including a director. The lowest salary among the 30 employees is $22,000. The director’s salary is $180,000, which is more than twice as much as anyone else’s salary. Decide for each of the following statements about the 30 salaries whether it is true, false, or you cannot tell on the basis of the information at hand. • The median salary is below $60,000.• The average salary is below $60,000.• If all salaries are increased by $1,000, that adds $1,000 to the average.• If the director’s salary is doubled, and all other salaries remain the same, that increases the average salary.• If the director’s salary is doubled, and all other salaries remain the same, that increases the median salary.• The standard deviation of the salaries is larger than $180,000
Q. Calculate mean from the following by applying direct method: Group of item : Frequency : 0-5 5-10 10-15 15-20 20-25 5 7 8 6 4

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