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Chapter 11: Q. 8 (page 734)
The expected count of cases of lymphoma in homes with an HCC is
(a) .
(b) .
(c) .
(d) .
(e) None of these.
a)
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Software gives test statistic and -value close to 0 . The correct interpretation of this result is
(a) the probability of getting a random sample of teens that yields a value of of or larger is basically .
(b) the probability of getting a random sample of teens that yields a value of of or larger if is true is basically .
(c) the probability of making a Type I error is basically .
(d) the probability of making a Type II error is basically .
(e) it's very unlikely that these data are true.
32. How are schools doing? Refer to Exercises 28 and 30 .
(a) Check that the conditions for performing the chi-square test are met.
(b) Use Table to find the -value. Then use your calculator's command.
(c) Interpret the -value from the calculator in context.
(d) What conclusion would you draw? Justify your answer.
A Type I error would occur if we conclude that
(a) HCC wiring caused cancer when it actually didn't.
(b) HCC wiring didn't cause cancer when it actually did.
(c) there is no association between the type of wiring and the form of cancer when there actually is an association.
(d) there is an association between the type of wiring and the form of cancer when there actually is no association.
(e) the type of wiring and the form of cancer have a positive correlation when they actually don't.
The category that contributes the largest component to thestatistic is
(a) White.
(c) Hispanic.
(b) Black.
(d) Other.
(e) The answer cannot be determined since this is only a sample.
Birds in the trees Researchers studied the behavior of birds that were searching for seeds and insects in an Oregon forest. In this forest, % of the trees were Douglas firs, % were ponderosa pines, and % were other types of trees. At a randomly selected time during the day, the researchers observed red-breasted nuthatches: were seen in Douglas firs, in ponderosa pines, and in other types of trees. Do these data suggest that nuthatches prefer particular types of trees when they’re searching for seeds and insects? Carry out a chi-square goodness-of-fit test to help answer this question.
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