HomeworkLib
Question

In a survey of 159 publicly-traded companies, the average price-earnings ratio was 17.7 with a standard...

In a survey of 159 publicly-traded companies, the average price-earnings ratio was 17.7 with a standard deviation of 7.8. When testing the hypothesis (at the 5% level of significance) that the average energy use has decreased from the past value of 16.3, what is the test statistic? (please round your answer to 2 decimal places)

math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Solution:

H0: = 16.3

n = 159

= 17.7

s = 7.8

= 5% = 0.05

Since population SD is unknown,we use t test.

The test statistics t is given by ..

t =  

= (17.7 - 16.3)/(7.8/159)

= 2.26

Test Statistic t = 2.26

0 0
Add a comment
Know the answer?
Add Answer to:
In a survey of 159 publicly-traded companies, the average price-earnings ratio was 17.7 with a standard...
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. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • In a survey of 177 publicly-traded companies, the average price-earnings ratio was 18 with a standard...

    In a survey of 177 publicly-traded companies, the average price-earnings ratio was 18 with a standard deviation of 8.6. When testing the hypothesis (at the 5% level of significance) that the average energy use has decreased from the past value of 16.3, what is the test statistic? (please round your answer to 2 decimal places)

  • In a survey of 173 publicly-traded companies, the average price-earnings ratio was 18.3 with a standard...

    In a survey of 173 publicly-traded companies, the average price-earnings ratio was 18.3 with a standard deviation of 7.9. When testing the hypothesis (at the 5% level of significance) that the average energy use has decreased from the past value of 16.6, what is the test statistic? (please round your answer to 2 decimal places)

  • In a survey of 120 publicly-traded companies, the average price-earnings ratio was 18.5 with a standard...

    In a survey of 120 publicly-traded companies, the average price-earnings ratio was 18.5 with a standard deviation of 8.2. When testing the hypothesis (at the 5% level of significance) that the average energy use has decreased from the past value of 16.8, what is the p-value? (please round your answer to 4 decimal places)

  • QUESTION 12 5 points Saved In a survey of 200 publicly-traded companies, the average price earnings...

    QUESTION 12 5 points Saved In a survey of 200 publicly-traded companies, the average price earnings ratio was 18.5 with a standard deviation of 8.2. When testing the hypothesis (at the 5% level of significance) that the average price- earnings ratio has increased from the past value of 16.8, the null and alternative hypotheses would be which of the following? 0 H0: μ = 16.8. HA: μ #16.8 Ho: μ 16.8,HA: μ > 16.8 Hope 16.8,HA: μ < 16.8 HOP-16.8,HA:...

  • find Earnings Per Share and Price/Earnings ratio information for two competing publicly traded companies. State what...

    find Earnings Per Share and Price/Earnings ratio information for two competing publicly traded companies. State what you have found and provide a couple of sentences of explanation as to what those ratios tell you about the firms. Finally, provide some analysis of which firm you think would be the better investment, based on this information.

  • find Earnings Per Share and Price/Earnings ratio information for two competing publicly traded companies. State what...

    find Earnings Per Share and Price/Earnings ratio information for two competing publicly traded companies. State what you have found and provide a couple of sentences of explanation as to what those ratios tell you about the firms. Finally, provide some analysis of which firm you think would be the better investment, based on this information.

  • A survey of 93 men found that an average amount spent on St. Patrick's day of...

    A survey of 93 men found that an average amount spent on St. Patrick's day of $51 with a standard deviation of $16. A similar survey of 87 women found they spent an average of $44 with a standard deviation of $18. When testing the hypothesis (at the 5% level of significance) that men spend more than women on St. Patrick's day, what is the test statistic? (please round your answer to 2 decimal places)

  • According to a survey, the average American person reads for 3 hours per week. To test...

    According to a survey, the average American person reads for 3 hours per week. To test if the amount of reading in Chicago is more than the national average, a researcher decides to do a hypothesis test, at a 5% significance level. She surveys 17 Chicagoans randomly and asks them about their amount of TV each week, on average. From the data, the sample mean time is 3.4 hours per week, and the sample standard deviation (s) is 0.8 hours....

  • A) In an effort to reduce energy costs, a major university has installed more efficient lights...

    A) In an effort to reduce energy costs, a major university has installed more efficient lights as well as automatic sensors that turn the lights off when no movement is present in a room. Historically, the cost of lighting an average classroom for 1 week has been $265. To determine whether the changes have signficantly reduced costs, the university takes a sample of 83 classrooms. They find that the average cost for 1 week is $242 with a standard deviation...

  • A recent national survey found that high school students watched an average (mean) of 7.8 movies...

    A recent national survey found that high school students watched an average (mean) of 7.8 movies per month with a population standard deviation of 0.5. The distribution of number of movies watched per month follows the normal distribution. A random sample of 30 college students revealed that the mean number of movies watched last month was 7.3. At the 0.05 significance level, can we conclude that college students watch fewer movies a month than high school students? State the null...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT