state the null and alternate hypotheses, Basic Statistics

Assignment Help:

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?

 


Related Discussions:- state the null and alternate hypotheses

Calculate the average account balance, In June 2009, the average Australian...

In June 2009, the average Australian credit card account balance was $3,127, according to data extracted Assuming that these balances are approximately Normally distributed with a

Calculate bonferroni confidence intervals, The "recoverytime" files record ...

The "recoverytime" files record the time (in days) for male blue-collar workers to recover from a common wrist fracture. Each man was given a questionnaire to complete to determine

Var representation of sutse model, Dear expert, Assume that we have a multi...

Dear expert, Assume that we have a multivariate unobserved component model (or SUTSE, seemingly unrelated time series equation model) in STATE SPACE form, that is: Y(t) = H A(t) +

Calculate the probability of dealt, Please show work as we need to understa...

Please show work as we need to understand how to calculate the following 4 questions: 1.  You play a card game where 2s are considered wild.  You are dealt 7 cards - what is the

Compute the mean absolute deviation and mean square error, Toyota Motors in...

Toyota Motors introduced a hybrid car Hybrid G in the U.S. market in 2006. In the first three years, the sales of Hybrid G were strong due to the buzz surrounding the hybrid car co

X2 test uses, The  χ 2  test is one of the most popular statistical infe...

The  χ 2  test is one of the most popular statistical inference procedures today. It is applicable to a very large number of problems in practice which can be summed up under th

Calculate cronbachs alpha, This week, you have learned about how to use Cro...

This week, you have learned about how to use Cronbach's alpha as a measure of scale reliability. In this Application, you will calculate Cronbach's alpha for provided data. To p

Chi Square and Z tests, What is it that created the numerical relationship ...

What is it that created the numerical relationship between a chi square test and a z test?

ANOVA, This problem will introduce the learner into a technique called Anal...

This problem will introduce the learner into a technique called Analysis of Variance. For this course we will only conduct a simple One-Way ANOVA and touch briefly on the importan

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd