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Chapter 11: Q.43 (page 657)

A math teacher wants to see if two of her classes have the same distribution of test scores. What test should she use?

Short Answer

Expert verified

A math teacher will use a test of Homogeneity.

Step by step solution

01

Given Information

A math teacher wants to see if two of her classes have the same distribution of test scores.

02

Explanation

It can be used to determine whether the distribution of two populations is the same. The same approach is used to calculate the test statistics for a homogeneity test as it is for an independent test. A test of independence examines whether or not two variables are mutually exclusive.

Therefore, a math teacher will use a test of Homogeneity.

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Most popular questions from this chapter

A plant manager is concerned her equipment may need recalibrating. It seems that the actual weight of the 15oz. cereal boxes it fills have been fluctuating. The standard deviation should be at most 0.5oz. In order to determine if the machine needs to be recalibrated, 84randomly selected boxes of cereal from the next day鈥檚 production were weighed. The standard deviation of the 84 boxes was 0.54. Does the machine need to be recalibrated?

A psychologist is interested in testing whether there is a difference in the distribution of personality types for business majors and social science majors. The results of the study are shown in Table. Conduct a test of homogeneity. Test at a 5%level of significance.

OpenConscientiousExtrovertAgreeableNeuroticBusiness4152466158Social Science7275638065

Determine the appropriate test to be used in the next three exercises.

An archeologist is calculating the distribution of the frequency of the number of artifacts she finds in a dig site. Based on

previous digs, the archeologist creates an expected distribution broken down by grid sections in the dig site. Once the site has been fully excavated, she compares the actual number of artifacts found in each grid section to see if her expectation was accurate.

df= ________

The expected percentage of the number of pets students have in their homes is distributed (this is the given distribution for the student population of the United States) as in Table 11.12.

Number of PetsPercent0181252303184+9

A random sample of 1,000students from the Eastern United States resulted in the data in Table 11.13.

Number of PetsFrequency02101240232031404+90

At the 1% significance level, does it appear that the distribution 鈥渘umber of pets鈥� of students in the Eastern United States is different from the distribution for the United States student population as a whole? What is the p-value?
See all solutions

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