state the null and alternate hypotheses, Basic Statistics

The mean length of the work week for the population of American workers was reported to be 39.2 hours with a standard deviation of 4.8 hours in September, 2000. A researcher wants to determine if the average work week has changed from 39.2 hours. A sample of 112 workers yielded a mean of 38.5 hours. Based on this sample, can we conclude at the 5% significance level that the average length of the work week has changed?

A.   State the null and alternate hypotheses

B.    Identify the test statistic

C.   State the decision rule.

D.   Show the appropriate calculations and state the statistical decision.

E.    What conclusions can you draw concerning the length of work week for the population of American workers?


Posted Date: 3/26/2013 2:23:02 AM | Location : United States

Related Discussions:- state the null and alternate hypotheses, Assignment Help, Ask Question on state the null and alternate hypotheses, Get Answer, Expert's Help, state the null and alternate hypotheses Discussions

Write discussion on state the null and alternate hypotheses
Your posts are moderated
Related Questions
A.  A computer rejuvenation facility receives systems from the fleet at 24 systems/day (assume this is a Poisson process).  It takes the triage function 30 minutes (assumed exponen

Your company operates a machine shop, and, having heard you had experience in statistics and design of experiments, consulted you for your opinion on an experiment they want to run

State the main reason because of which the differences between a Cash Book and Bank Passbook. Ans. The difference can be stated as follows a) Sometime cheque issued to party on t

Long before Bohr gave his theory of hydrogen atom, various scientists had observed experimentally, the spectral series of hydrogen atom. Bohr offered a theoretical explanation of t

A team of archeologists have discovered the fossil skull of an extinct and exceptionally large crocodile (sarcosuchus).  Unfortunately, they have not been able to fi

Alarm units are to be connected at four fixed positions along a pipeline. In how many ways can the four available alarm unites be connected to the four positions along the line?

1. Suppose that a population has mean, µ, and standard deviation, σ. What does the central limit theorem tell us about the distribution of the sample mean?

Holding period return: Holding period return is the return earned by the virtue of holding an asset over a given period. The return is equal to the income and other gains earned fr

1. Compute the z scores for the following raw scores where   = 78 and the standard deviation = 4. a. 72 b. 82 c. 78 d. 87 e. 71