Ask Question, Ask an Expert


Ask Statistics and Probability Expert

Test the significance difference between two populations mean.

1. Your employer asks you to determine whether sales of cars (DV) can be predicted from the GDP (Gross Domestic Product).
What is an appropriate inferential statistical test for the case scenario and Why?
What would be known if the computed statistical result is significant?

2. The director for training at a company that manufactures equipment is interested in determining whether different training methods have an effect on the productivity of assembly line employees.  One of his employees who are tasked with testing this assumption randomly assigns 42 recently hired employees into two groups of 21; of which first receives a computer assisted, individual-based training program and the other receive a team-based training program.  Upon completion of the training, employees are evaluated on the time (in seconds) it took to assemble a part.  The results are as follows:


Computer-Assisted, Individual-Based Program

Team-Based Program

19.4      20.7    21.8     

22.4    18.7      19.3

14.1      16.1    16.8

15.6    18.0      21.7

14.7      16.5    16.2

30.7    23.7      12.3

16.4      18.5    16.7

16.0    13.8      18.0

19.3      16.8    17.7

20.8    17.1      28.2

19.8      19.3    16.0 

20.8    24.7      17.4

17.7      17.4    16.8

20.1    15.2      23.2

The director is an avid proponent of computer-assisted training and asserts even before the research study that the computer-assisted training program will produce better outcomes than the team-based training program. 
State hypotheses for this study (both null and research)
What would the researcher conclude with these data? Assume a significance level of 0.05

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M921828

Have any Question? 

Related Questions in Statistics and Probability

Find alice and bobs common key k by using the

Find Alice and Bob's common key K by using the Diffle-Hellman-Markle key exchange scheme with the given values of M,n,a and b. M | n | a | b 17 | 7 | 6 | 7 Alice and Bob's common key K is this is a cryptography chart.

Consumer reports provided extensive testing and ratings for

Consumer Reports provided extensive testing and ratings for more than 100 HDTVs. An overall score, based primarily on picture quality, was developed for each model. In general, a higher overall score indicates better per ...

Discuss the beginnings of the cold war from the position

Discuss the beginnings of the Cold War. From the position of a Soviet ruler, how might you have viewed the situation following WWII? How did the Truman administration attempt to handle it? (Include as many of the followi ...

1 write the general form of a regression equation that has

1. Write the general form of a regression equation that has a single predictor variable. Identify the criterion variable, the predictor variable, the regression constant, and the regression coefficient. 2. A regression e ...

Subway footlongs are supposed to be 12 inches long you

Subway footlongs are supposed to be 12 inches long. You strongly suspect that Subway is up to its old tricks and is reducing the size of its delicious sandwiches. For your research, you randomly sample Subways and eat 10 ...

Assignment- sampling distributions and estimation

Assignment- Sampling Distributions and Estimation; Hypothesis Testing 1. In a simple random sample from a population of several hundred that's approximately normally distributed, the following data values were collected. ...

When conducting a hypothesis test if z calculated is less

When conducting a hypothesis test, if z calculated is less than z critical, you should accept the null hypothesis?

Consider the following gameyou pay 100 and a fair 6-sided

Consider the following game. You pay $1.00 and a fair 6-sided die is rolled. If the roll is 1 or 3, then you get your dollar back and the game ends. If the roll is 5, you get $2.00 back (your dollar plus an additional do ...

A random sample of the price of gasoline from 20gas

A random sample of the price of gasoline from 20gas stations in a region gives the statistics below. Complete parts a) and b) ybar = $3.59, s = $0.24 a) Find a 95% confidence interval for the mean price of regular gasoli ...

It is estimated 30 of all adults in united states invest in

It is estimated 30% of all adults in United States invest in stocks and that 88% of U.S. adults have investments in fixed income instruments (savings accounts, bonds, etc.). It is also estimated that 25% of U.S. adults h ...

  • 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