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Chapter 8: Q 64. (page 542)

Judy is interested in the reading level of a medical journal. She records the length of a random sample of100words. The histogram displays the distribution of word length for her sample. Determine if the Normal/Large Sample condition is met in this context.

Short Answer

Expert verified

The condition of normality is met.

Step by step solution

01

Given Information

The graph is as below:

02

Explanation

Observations from graph:

  • The distribution shape is left skewed containing two outliers.
  • Distribution is left skewed. Therefore it can be refer to as normal distribution normally.
  • As sample size is 100>30.
  • Applying Central Limit Theorem, since sample size is larger; so distribution is normally normal.
  • So, we can use condition for tdistribution.

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Most popular questions from this chapter

In a poll conducted by phone,

I. Some people refused to answer questions.

II. People without telephones could not be in the sample.

III. Some people never answered the phone in several calls.

Which of these possible sources of bias is included in the 卤2%margin of error announced for the poll?

a. I only

b. II only

c. III only

d. I, II, and III

e. None of these

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a. Interpret the confidence level.

b. Name two things you could do to reduce the margin of error. What drawbacks do these actions have?

c. Describe how non response might lead to bias in this survey. Does the stated margin of error account for this possible bias?

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for the seated systolic blood pressure of the 27randomly selected adults. What is the standard error of the mean? Interpret this value in context.

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