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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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Construct a confidence interval for the population mean hours spent watching television per month.
(a) State the confidence interval
(b) sketch the graph, and
(c) calculate the error bound.
Construct a confidence interval for the population mean weight of the heads of lettuce. State the confidence interval, sketch the graph and calculate the error bound.
The mean age for all Foothill College students for a recent Fall term was . The population standard deviation has been pretty consistent at . Suppose that twenty-five Winter students were randomly selected. The mean age for the sample was . We are interested in the true mean age for Winter Foothill College students. Let the age of a Winter Foothill College student.
In words, define the random variable .
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.
Construct a confidence interval for the true mean number of colors on national flags.
Calculate the following:
a. lower limit
b. upper limit
c. error bound
The Ice Chalet offers dozens of different beginning iceskating classes. All of the class names are put into a bucket. The 5 P.M., Monday night, ages 8 to 12, beginning ice-skating class was picked. In that class were 64 girls and 16 boys. Suppose that we are interested in the true proportion of girls, ages 8 to 12, in all beginning ice-skating classes at the Ice Chalet. Assume that the children in the selected class are a random sample of the population.
Define a new random variable P′. What is p′ estimating?
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