Question

Use the following for the next 4 questions: A recent national survey found that high school...

Use the following for the next 4 questions: A recent national survey found that high school students watched an average of 6.8 DVDs per month with a population standard deviation of 2.5 hours. The distribution of times follows the normal distribution. A random sample of 36 college students revealed that the mean number of DVDs watched last month was 6.1. At the 0.05 significance level, can we conclude that college students watch fewer DVD's a month than high school students (average of 6.8 DVDs per month)? H subscript 0 colon space mu greater or equal than 6.8 H subscript 1 colon space mu less than space 6.8

a) What kind of test is this?

One-tail (right tail)

Two-tail

One-tail (left tail)

B) What is the Critical Value?

C) c) Calculate the test statistic. Round to two decimal places.

d) What is your decision regarding the null hypothesis?

Reject or Do not Reject?

e) What is your conclusion?

College students watch fewer DVDs than high school students.

College students do not watch fewer DVDs than high school students.

Homework Answers

Answer #1

Ho :  
Ha :  
a) This is a One-tail (left tail) test.

b) Level of significance(l.o.s.) :   = 0.05
Critical value = Z () = Z (0.05) = -1.6449 (from Z tables)

c) Calculations :   = 6.1,   = 2.5 & n = 36

Z cal =   =   = -1.68

d) Since Z cal < Z tab, we reject Ho at 5% l.o.s.

e) Thus, we conclude that college students watch fewer DVDs than high school students.

Hope this answers your query!

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A recent national survey found that high school students watched an average (mean) of 7.2 DVDs...
A recent national survey found that high school students watched an average (mean) of 7.2 DVDs per month with a population standard deviation of 0.90 hour. The distribution of DVDs watched per month follows the normal distribution. A random sample of 35 college students revealed that the mean number of DVDs watched last month was 6.20. At the 0.05 significance level, can we conclude that college students watch fewer DVDs a month than high school students? b. State the decision...
A recent national survey found that high school students watched an average (mean) of 7.2 DVDs...
A recent national survey found that high school students watched an average (mean) of 7.2 DVDs per month with a population standard deviation of 0.90 hour. The distribution of DVDs watched per month follows the normal distribution. A random sample of 35 college students revealed that the mean number of DVDs watched last month was 6.20. At the 0.05 significance level, can we conclude that college students watch fewer DVDs a month than high school students? d. What is your...
A recent national survey found that high school students watched an average (mean) of 7.6 DVDs...
A recent national survey found that high school students watched an average (mean) of 7.6 DVDs per month with a population standard deviation of 0.5 hours. The distribution of times follows the normal distribution. A random sample of 61 college students revealed that the mean number of DVDs watched last month was 7.0. At the 0.01 significance level, can we conclude that college students watch fewer DVDs a month than high school students? Use α = 0.01. a. State the...
[The following information applies to the questions displayed below.] A recent national survey found that high...
[The following information applies to the questions displayed below.] A recent national survey found that high school students watched an average (mean) of 7.2 DVDs per month with a population standard deviation of 1.00. A random sample of 49 college students revealed that the mean number of DVDs watched last month was 6.50. At the .05 significance level, can we conclude that college students watch fewer DVDs a month than high school students? References 14. value: 10.00 points Required information...
7) A recent national survey found that high school students watched an average (mean) of 7.1...
7) A recent national survey found that high school students watched an average (mean) of 7.1 movies per month with a population standard deviation of 1.0. The distribution of number of movies watcher per month follows the normal distribution. A random sample of 41 college students revealed that the mean number of movies watched last month was 6.6. At the 0.05 significance level, can we conclude that college students watch fewer movies a month than high school students? a) State...
A recent national survey found that high school students watched an average (mean) of 7.1 movies...
A recent national survey found that high school students watched an average (mean) of 7.1 movies per month with a population standard deviation of 1.0. The distribution of number of movies watched per month follows the normal distribution. A random sample of 33 college students revealed that the mean number of movies watched last month was 6.2. At the 0.05 significance level, can we conclude that college students watch fewer movies a month than high school students? State the null...
A recent national survey found that high school students watched an average (mean) of 7.6 movies...
A recent national survey found that high school students watched an average (mean) of 7.6 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 41 college students revealed that the mean number of movies watched last month was 7.0. At the 0.05 significance level, can we conclude that college students watch fewer movies a month than high school students? State the null...
A recent national survey found that high school students watched an average (mean) of 7.3 movies...
A recent national survey found that high school students watched an average (mean) of 7.3 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 40 college students revealed that the mean number of movies watched last month was 6.6. At the 0.05 significance level, can we conclude that college students watch fewer movies a month than high school students? State the null...
A recent national survey found that high school students watched an average (mean) of 7.7 movies...
A recent national survey found that high school students watched an average (mean) of 7.7 movies per month with a population standard deviation of 0.9. The distribution of number of movies watched per month follows the normal distribution. A random sample of 46 college students revealed that the mean number of movies watched last month was 7.0. At the 0.05 significance level, can we conclude that college students watch fewer movies a month than high school students? 1.State the null...
1.The following data shows test scores for a sample of statistics students. 83, 64, 84, 76,...
1.The following data shows test scores for a sample of statistics students. 83, 64, 84, 76, 84, 54, 75, 59, 70, 63, 80, 84, 73, 68, 52, 65, 90, 52, 95, 36, 78, 61, 59, 84, 95, 47, 87 a. Find a 95% confidence interval for the mean test score for all students. b. Interpret this 95% CI for the population mean. c. What is the margin of error? 2. A recent national survey found that high school students watched...