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Chapter 10: Q. 6 (page 596)

Use the following information to answer the next 15 exercises: Indicate if the hypothesis test is for

a. independent group means, population standard deviations, and/or variances known

b. independent group means, population standard deviations, and/or variances unknown

c. matched or paired samples

d. single mean

e. two proportions

f. single proportion

According to a television commercial, 80%of dentists agree that Ultrafresh toothpaste is the best on the market

Short Answer

Expert verified

For single proportions, the test is used.

Step by step solution

01

Given information

According to a television commercial, 80% of dentists feel that ultra-fresh toothpaste is the best.

02

Explanation

Assuming that a majority of dentists think that ultra-fresh toothpaste is the best choice asp.

The null and alternative hypothesis is given as

H0:P=0Ha:P>0

This shows that this hypothesis test is for single proportions.

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Most popular questions from this chapter

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.

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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 is the sample mean difference?
See all solutions

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