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Chapter 8: Q.35 (page 479)
In one complete sentence, explain what the interval means.
The confidence interval can be interpreted as that one is confident that the true mean age for the Winter Foothill College students lies betweenyears and years.
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The data in Table are the result of a random survey of national flags (with replacement between picks) from various countries. We are interested in finding a confidence interval for the true mean number of colors on a national flag. Let the number of colors on a national flag.
Is known.
Out of a random sample of freshmen at State University, students have declared a major. Use the “plus-four” method to find a % confidence interval for the true proportion of freshmen at State University who have declared a major.
In words, define the random variable .
Which distribution should you use for this problem?
A random sample of statistics students were asked to estimate the total number of hours they spend watching television in an average week. The responses are recorded in Table . Use this sample data to construct a % confidence interval for the mean number of hours statistics students will spend watching television in one week.
Table
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