Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Hypothesis testig for paired sample t test.

A company wanted to know if attending a course on "how to be a successful salesperson" can increase average sales of its employees.  The company sent six of its salespersons to attend this course.  The following table gives the one-week sales of these salespersons before and after they attended this course:

 

Before

12

18

25

9

14

16

After

18

24

24

14

19

20

Differences

 

 

 

 

 

 

 

First find out the 6 differences (Before course sales - After course sales)  

Before

12

18

25

9

14

16

After

18

24

24

14

19

20

Differences

-6

-6

1

-5

-5

-4

 

Where,

Differences = before course sales - After course sales

1. Find out the mean of the 6 differences

2. Find out the standard deviation of the differences

3. To find out whether the course is effective in increasing sale, the appropriate set of hypothesis for testing is (Be careful which one you choose!)

4. The appropriate test to use is

a. T-test           b. 1-PropZtest             c. ZTest            d. Chi-square test

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M920203

Have any Question? 


Related Questions in Statistics and Probability

1 an investigator wants to determine if a new program aimed

1. An investigator wants to determine if a new program aimed at reducing the overall number of pregnancies in a highly populated area is effective (reducing average births below 6 per household). In order to carry out th ...

It is estimated that 89 of senior citizens suffer from

It is estimated that 89% of senior citizens suffer from sleep disorders and 8% suffer from anxiety. Moreover, 5% of senior citizens suffer from both sleep disorders and anxiety. (a) Given that a senior citizen suffers fr ...

A family is relocating from st louis missouri to california

A family is relocating from St. Louis, Missouri, to California. Due to an increasing inventory of houses in St. Louis, it is taking longer than before to sell a house. The wife is concerned and wants to know when it is o ...

A committee comprised of 15 members is called upon to rank

A committee comprised of 15 members is called upon to rank three colors: red, blue, and yellow, from most preferred to least preferred. The committee members simultaneously announce their strict preference relations over ...

A professor has learned that four students in her class of

A professor has learned that four students in her class of 18 will cheat on the exam. She decides to focus her attention on seven randomly chosen students during the exam. a. What is the probability that she finds at lea ...

Using the standard normal distribution tables what is the

Using the standard normal distribution tables, what is the area under the standard normal curve corresponding to Z

Probabilities of graduation and publicationprofessors have

Probabilities of Graduation and Publication Professors have hundreds of students in their classes each year. Some professors teach only upper division courses to students who are in their major course of study. Of this g ...

In your own wordsquestion 1 critique and expand upon the

In your own words! Question 1: Critique and expand upon the statement: Every college graduate should understand the basic principles of the Operations function of a business. Question 2: Identify three current trends in ...

Suppose that the number of men equals the number of women

Suppose that the number of men equals the number of women. Prove the following claims, or provide counterexamples: (a) For every pair of matchings there exist preference relations for which these are two stable matchings ...

For each experiment described below identify any confounds

For each experiment described below, identify any confounds that may be present. (Be careful not to identify things as confounds that are not.) Then, redesign each study to eliminate any confounds that you find. Write a ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro