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Chapter 8: Q.8 (page 477)
Which distribution should you use for this problem?
The distribution is.
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If it were later determined that it was important to be more than confident and a new survey was commissioned, how would it affect the minimum number you need to survey? Why?
Using the same , , and level of confidence, suppose that were instead of . Would the error bound become larger or smaller? How do you know?
Using the same p鈥� and n = 80, how would the error bound change if the confidence level were increased to 98%? Why?
The data in the 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.
Calculate the following:
(a)
(b)
(c)
The data in the 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.
As a result of your answer to Exercise, state the exact distribution to use when calculating the confidence interval.
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