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1. Take Test: Assignment 7.. - Hypothesis Tests

S20 MATH1310-01 Statistical Concepts

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Take Test: Assignment 7.. - Hypothesis Tests

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QUESTION 1

1. State the null hypothesis and alternate hypothesis for the following:
2. A machine on a production line is set to automatically fill each bottle with 500 mLof 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.
3. In the first blank, state the sign, and in the second blank, state the number.
4. H₀:
6. H1:

2 points

QUESTION 2

1. State the null hypothesis and alternate hypothesis for the following:
2. The publisher ofCelebrity Livingclaims that the mean sales of personalitymagazines featuring celebrities such as Angelina Jolie or Kim Kardashianis at least 1.5 million per week. A sample of 10 comparable titlesshows 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.
3. H₀:
5. H1:

2 points

QUESTION 3

1. Use the following for thenext4questions:
2. A recent national survey found that high school students watched an average of 6.8DVDsper 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 ofDVDswatched last month was 6.1. At the 0.05 significance level, can we conclude that college students watch fewerDVD'sa month than high school students (average of 6.8 DVDsper month)?
4. a)What kind of test is this?
6. One-tail(right tail)
7. Two-tail
8. One-tail (left tail)

1 points

QUESTION 4

1. b) What is the critical value?

1 points

QUESTION 5

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

1 points

QUESTION 6

1. d) What is your decision regarding the null hypothesis?
2. Reject
3. Do not reject

1 points

QUESTION 7

1. e) What is your conclusion?
2. College students watch fewer DVDsthan high school students.
3. College students do not watch fewerDVDsthan high school students.