The mean length of the work week for the population of, Ask an Expert

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?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9532137

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

What percent of the measurements are found below the 30th

What percent of the measurements are found below the 30th percentile? Found above the 30th percentile? For the regression line y^ = 3x + 2 what is the best predicted value if x is 7? Assume that male and female births ar ...

1 the personnel office at a large electronics firm

1. The personnel office at a large electronics firm regularly schedules job interviews and maintains records of the interviews. From the past records, they have found that the length of a first interview is normally dist ...

1 suppose anbspseven-yearnbsp1000nbspbond withnbspanbsp79

1) Suppose a? seven-year, $1,000 bond with a 7.9% coupon rate and semiannual coupons is trading with a yield to maturity of 6.66 % i. Is this bond currently trading at a? discount, at? par, or at a? premium? Explain. ? ...

In developing their warranty policy a washing machine

In developing their warranty policy, a washing machine company estimates that over a 1-year period 15% of their new washing machine will need to be repaired. You and your neighbor both purchase a new washing machine. 1) ...

Assume 20 of customers who enter a clothing store make a

Assume 20% of customers who enter a clothing store make a purchase and customers behave independently of one another. Ten customers enter the store in the next hour. The salesman on duty makes $20 per hour plus a $10 com ...

Describe the general concept of economic analysis is this

Describe the general concept of economic analysis. Is this type of analysis necessary, and can it really help the individual investor make a decision about stock? Explain

Question in the example of the diamond in the cave what

Question: In the example of the diamond in the cave, what would be efficient law if any one explorer had only a very small probability of finding the diamond? How would your answer change if the costs of exploration were ...

A manufacturer of matches randomly and independently puts

A manufacturer of matches randomly and independently puts 15 matches in each box of matches produced. The company knows that one-tenth of 6 percent of the matches are flawed. What is the probability that a matchbox will ...

The interest rate on one-year treasury bonds is 1 the rate

The interest rate on one-year treasury bonds is 1%, the rate on two-year treasury bonds is 0.9%, and the rate on three-year treasury bonds is 0.8%. Using the expectations theory, compute the expected one-year interest ra ...

The average starting salary for graduates at a university

The average starting salary for graduates at a university is $33,000 with a standard deviation of $2,000. If a histogram of the data shows that it takes on a mound shape, the empirical rule says that approximately 68% of ...

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

Recent Questions

Ask Statistics and Probability Expert