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Read the description of the study and comment briefly on the, seems to be, lesson.
The Public Health Services studied the effects of smoking on health, in a large sample of representative households. For man and for women in each age group, those who had never smoked were on average somewhat healthier than the current smokers, but the current smokers were on average much healthier than those who had recently stopped smoking.
The lesson seems to be that you shouldn't start smoking, but once you have started, don't stop.
Comment briefly on what would be a more realistic interpretation of the results of the study.
Time at the table Does how long young children remain at the lunch table help predict how much they eat? Here are data on a random sample of 20 toddlers.
Use relative frequencies to estimate the probability that a seed will not germinate. What is your estimate? Use relative frequencies to estimate the probability that a seed will not germinate.
Test the hypothesis that there is no difference between the two populations at the a= 0.05 level, i.e, H0:M1 = M2 vs HA:M1 ? M2. Whats your conclusion?
What is the probability that the person must wait for a table for at most 20 minutes? b. What is the probability that the person must wait for a table for over
Fruits, Glucose Data are available at a website on the weight of glucose in 84 different fruits. Make a histogram of the data, and describe that distribution.
How many percent of the subscribers rented a car during the past 12 months for personal reasons? Show work!
abc manufacturing has 8 machines that perform a particular task. breakdowns occur frequently for this machine. past
An invoice for a laptop computer that cost $625.68 is dated September 15, with sales terms of 3/10 EOM.
Compare and contrast the fundamental differences between special-cause variation and common-cause variation. Provide one (1) business process example of each variation to support your response.
The pollsters can be 95% confident that the true proportion of adults who approve of human cloning is within what percentage of the estimated 11.7%?
(a) What is the shape of this sampling distribution? [How do you know?] (b) What is the mean of this sampling distribution? (Give your answer correct to one decimal place.)
Suppose that the probability of a long-distance carrier's customer leaving for another carrier from one month to the next is 0.15. What distribution models the retention of an individual customer? What is the expected value and standard deviation?
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