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Chapter 10: Q. 10 (page 596)

A new medicine is said to help improve sleep. Eight subjects are picked at random and given the medicine. The means

hours slept for each person were recorded before starting the medication and after.

Short Answer

Expert verified

The test is for paired or matching samples.

Step by step solution

01

Given information

Eight people were chosen at random and given drugs to help them sleep better. The average sleep hours for each person are recorded before and after they get drugs.

02

To identify the most appropriate hypothesis test for the supplied data.

Assuming a mean difference in sleeping hours before and after drug administration as 渭

The null and alternative hypotheses are stated as follows:

H0:渭=0Ha:渭鈮�0

This shows that this hypothesis test is for matching or paired test.

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Most popular questions from this chapter

Two types of valves are being tested to determine if there is a difference in pressure tolerances. Fifteen out of a random sample of 100of Valve Acracked under 4500psi.Six out of a random sample of 100of Valve Bcracked under 4500psi.Test at a5% level of significance.

Use the following information to answer the next five exercises. A researcher is testing the effects of plant food on plant growth. Nine plants have been given the plant food. Another nine plants have not been given the plant food. The heights of the plants are recorded after eight weeks. The populations have normal distributions. The following table is the result. The researcher thinks the food makes the plants grow taller.

Is the population standard deviation known or unknown?

A new prep class was designed to improve SAT test scores. Five students were selected at random. Their scores on two practice exams were recorded, one before the class and one after. The data recorded in the table given below. Are the scores, on average, higher after the class? Test at a 5%level.

Conduct a hypothesis test to answer the next two exercises.
87. The exact distribution for the hypothesis test is:
a. the normal distribution
b. the Student's t-distribution
c. the uniform distribution
d. the exponential distribution

Use the following information to answer next five exercises. A study was conducted to test the effectiveness of a juggling class. Before the class started, six subjects juggled as many balls as they could at once. After the class, the same six subjects juggled as many balls as they could. The differences in the number of balls are calculated. The differences have a normal distribution. Test at the 1% significance level.

What conclusion can you draw about the juggling class?
See all solutions

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