Question


The manufacturer of a new cigarette claims that the average tar content per cigarette is 10.0 mg. The US Center for Smoking Research believes the tar content per
cigarette is greater than 10 mg and wishes to conduct a study to support their claim. They
take a random sample of 25 cigarettes from the production line and find an average of 10.20
mg of tar/cigarette and a standard deviation of .5 mg. Can the manufacturer’s claim be
refuted at the 0.01 level of significance?

A. State H o : ___________
B. State H A : ___________
C. Is this a one-tail or two-tail test? __________
D. What is (are) the critical value(s)? __________
E. What is the decision rule? __________________________________________________
F. Calculate the t statistic:


t = x̄ - µ m/ s/√n

G. What is your decision regarding H 0 and why? __________________________________
H. Interpretation of the results: ________________________________________________
__________________________________________________________________________

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #2

answered by: anonymous
0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1. Tar in cigarettes: Listed below are amounts of tar (mg per cigarette) in sing size...
1. Tar in cigarettes: Listed below are amounts of tar (mg per cigarette) in sing size cigarettes. 100-mm menthol cigarettes, and 100-mm non menthol cigarettes. The king size cigarettes are nonfiltered, nonmenthol, and nonlight. The 100-mm menthol cigarettes are filtered and nonlight. The 100-mm nonmenthol cigarettes are filtered and nonlight. Use a .05 significance level to test the claim that the three categories of cigarettes yield the same mean amount of tar. Given that only the king-size cigarettes are not...
A cigarette company rand an advertising campaign designed to improve sales. To evaluate their campaign, they...
A cigarette company rand an advertising campaign designed to improve sales. To evaluate their campaign, they had subjects record the average number of cigarettes smoked per day in the week before and the week after exposure to the ad. What can be concluded with an α of 0.05. The data are below. before after 46 25 21 34 31 20 34 26 27 41 35 17 12 29 18 19 27 26 16 41 a) What is the appropriate test...
When σ (population standard deviation) is unknown [Critical Value Approach] The value of the test statistic...
When σ (population standard deviation) is unknown [Critical Value Approach] The value of the test statistic t for the sample mean is computed as follows:       t =   with degrees of freedom d.f. = n – 1 where n is the sample size, µ is the mean of the null hypothesis, H0, and s is the standard deviation of the sample.       t is in the rejection zone: Reject the null hypothesis, H0       t is not in the rejection...
Vita Pills were advertised as having 751 mg of vitamin B3 per pill. A marketing firm...
Vita Pills were advertised as having 751 mg of vitamin B3 per pill. A marketing firm hypothesizes that the amount of vitamin B3 is less than what is advertised. What can be concluded with α = 0.10. The vitamin B3 content per pill from a sample of pills is as follows: 713, 761, 716, 721, 751, 721, 711, 741. a) What is the appropriate test statistic? ---Select--- na z-test One-Sample t-test Independent-Samples t-test Related-Samples t-test b) Population: ---Select--- sample of...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT