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Chapter 11: Q.62 (page 658)

The standard deviation of heights for students in a school is 0.81. A random sample of 50students is taken, and the standard deviation of heights of the sample is 0.96. A researcher in charge of the study believes the standard deviation of heights for the school is greater than 0.81.

What type of test should be used?

Short Answer

Expert verified

A test of single variance should be used.

Step by step solution

01

Given Information

The standard deviation of heights for students in a school is 0.81. A random sample of 50 students is taken, and the standard deviation of heights of the sample is 0.96.

02

Explanation

The standard variation of heights for kids in a school, according to the information, is 0.81.

The standard deviation of the sample heights is 0.81, and a random sample of 50pupils is collected.

When the population variance is similar to certain selected values, we learnt that chi-square analysis for single variance can be applied.

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Most popular questions from this chapter

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

A personal trainer is putting together a weight-lifting program for her clients. For a 90-day program, she expects each client to lift a specific maximum weight each week. As she goes along, she records the actual maximum weights her clients lifted. She wants to know how well her expectations met with what was observed.

Use a solution sheet to solve the hypothesis test problem. Go to Appendix E for the chi-square solution sheet. Round expected frequency to two decimal places College students may be interested in whether or not their majors have any effect on starting-salaries after graduation. Suppose that 300recent graduates were surveyed as to their majors in college and their starting salaries after graduation. Table 11.45shows the data. Conduct a test of independence.

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Table11.45

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State the hypothesis:

H0:

H伪:

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