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Take Test: Assignment 7.. - Hypothesis Tests

S20 MATH1310-01 Statistical Concepts

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Take Test: Assignment 7.. - Hypothesis Tests

Test Information

DescriptionInstructionsMultiple AttemptsNot allowed. This test can only be taken once.Force CompletionThis test can be saved and resumed later.Your answers are saved automatically.

Question Completion Status:

QUESTION 1

State the null hypothesis and alternate hypothesis for the following:

A machine on a production line is set to automatically fill each bottle with 500 mL of water. The quality control manager regularly takes random samples of the bottles from the production line to ensure that the machine is filling the bottles correctly. If not, the machine will need adjusting.

In the first blank, state the sign, and in the second blank, state the number.

H0:

H1:

2 points

QUESTION 2

State the null hypothesis and alternate hypothesis for the following:

The publisher of Celebrity Living claims that the mean sales of personality magazines featuring celebrities such as Angelina Jolie or Kim Kardashian is at least 1.5 million per week. A sample of 10 comparable titles shows that the mean weekly sales last week was 1.3 million. The publisher's claim of 1.5 million per week is to be verified.

H0:

H1:

2 points

QUESTION 3

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)?

a)What kind of test is this?

One-tail (right tail)

Two-tail

One-tail (left tail)

1 points

QUESTION 4

b) What is the critical value?

1 points

QUESTION 5

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

1 points

QUESTION 6

d) What is your decision regarding the null hypothesis?

Reject

Do not reject

1 points

QUESTION 7

e) What is your conclusion?

College students watch fewer DVDs than high school students.