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Exercise and adequate sleep. A survey of 656 boys and girls who were 13 to 18 years old asked about adequate sleep and other health-related behaviors. The recommended amount of sleep is six to eight hours per night.28 In the survey 59.4% of the respondents reported that they got less than this amount of sleep on school nights. An exercise scale was developed and was used to classify the students as above or below the median in this domain. Here is the 2 × 2 table of counts with students classified as getting or not getting adequate sleep and by the exercise variable:
(a) Find the distribution of adequate sleep for the high exercisers.
(c) Summarize the relationship between adequate sleep and exercise using the results of parts (a) and (b).
If A has a grade value of 4, B has a grade value of 3 and C has a grade value of 1, what is the expected grade of the class? Which law of probability will you use to compute this?
Assume the probability that a person has the desease is 0.08 for all people, independently of each other. Compute the total expected number of tests necessary.
For the following exercises, you do not use the Premiere Products database. 1. The DBA asks for your help in planning the data archive for the following Premiere Products database:
question assume that breast cancer affects .8 percent of the female population between 40 and 50 years of age. there
Imagine you are working as a tax professional that has been hired by a foreign corporation to develop a strategy to eliminate taxes on profits generated in the U.S. Suggest a strategy for your client to minimize its tax obligations to the U.S.
Consider the data set sunspots from Andrews and Herzberg (1985) as a response variable. For the predictor data x, use
a group of 14 friends got together for a wine contest. each guest brought his or her favorite bottle of pinot noir.
When rain is forecast, Mr. Pickwick takes his umbrella. When rain is not forecast, he takes it with probability 1/3. Find the probability that Pickwick has no umbrella, given that it rains.
Is there sufficient evidence for one to claim that in general, rugby players have a higher BMI than the multisport men? Perform the test at the 0.01 level of significance.
a survey provided the estimate that the mean number of hours of television viewing per household is 7.25 hours per day.
A researcher is analyzing a dataset to determine whether the independent variables predict students' reading level.
A technician services machines as companies in the Phoenix area. Depending on the type of malfunction, the service call can take exactly 1, 2, 3, or 4 hours. The different types of malfunctions occur at the same frequency.
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