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

Project -you must show all steps for the hypothesis testing

Project - You must show all steps for the hypothesis testing; use either the critical value approach or the p-value approach. 1) a) Choose one of the following quantitative variables from the data set: Age, Weight, Cell ...

At a factory that produces pistons for cars machine 1

At a factory that produces pistons for cars, Machine 1 produced 711satisfactory pistons and 79 unsatisfactory pistons today. Machine 2 produced 630 satisfactory pistons and 270 unsatisfactory pistons today. Suppose that ...

Suppose we would like to determine if the typical amount

Suppose we would like to determine if the typical amount spent per customer for dinner at a new restaurant in town is more than $20.00. A sample of 49 customers over a three-week period was randomly selected and the aver ...

How might one relate einsteins theory of relativity to

How might one relate Einstein's theory of relativity to mathematical perspective in art?

A sample of office assistants across the san francisco-bay

A sample of office assistants across the San Francisco-Bay Area was created. You want to build a model that will allow you to best predict a starting salary of potential new hires.  It was suggested that the data should ...

Suppose a new student honors societynbspalpha alpha

Suppose a new student honors society, Alpha Alpha Alpha, is going to start at Harvard. Alpha Alpha Alpha aims to be exclusive and only wants the best students.Currently, there are about 10,000 students enrolled at Harvar ...

Case study diets and weight lossnbspa study innbspthe

CASE STUDY Diets and Weight Loss  A study in The Journal of the American Medical Association describes the effects of diets on weight control. In the study, 311 women were randomly divided into four groups. The first gro ...

Assignmentthe production department of the newspaper wants

Assignment The production department of the newspaper wants to ensure that the mean blackness of the print for all newspapers is at least 0.97 on a standard scale in which the target value is 1.0. A random sample of 50 n ...

Answer questions a through e using the following

Answer questions (a) through (e) using the following information and output for multiple regression The production of car tires in any given year is related to the number of cars produced that year and in prior years. Su ...

Question to qualify for security officers training recruits

Question: To qualify for security officers training, recruits are tested for stress tolerance. The scores are normally distributed with a mean of 62 and a standard deviation of 8. If only the top 15% of recruits are sele ...

  • 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