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Question: Suppose that you were to read the following news story: "Researchers compared a new drug to a placebo for treating high blood pressure, and it seemed to work. But the researchers were concerned because they found that significantly more people got headaches when taking the new drug than when taking the placebo. Headaches were the only problem out of the 20 possible side effects the researchers tested." Do you think the researchers are justified in thinking the new drug would cause more headaches in the population than the placebo would? Explain.
Exercise: Suppose you were to read the following news story: "Researchers compared a new drug to a placebo for treating high blood pressure, and it seemed to work. But the researchers were concerned because they found that significantly more people got headaches when taking the new drug than when taking the placebo. Headaches were the only problem out of the 20 possible side effects the researchers tested."
Do you think the researchers are justified in thinking the new drug would cause more headaches in the population than the placebo would? Explain.
What standard deviation (within 0.001 inch) minimizes the annual cost of producing elevator rails? You do not need to try standard deviations in excess.
an automobile mileage study tested the following hypothesishypothesis conclusionhomicro? 25
The width of an interval is half of the difference between its upper and lower bounds. The width is a measure of the uncertainty of the number specified by the interval.
Suppose a consumer group suspects that the proportion of households that have three cell phones is 30%. A cell phone company has reason to believe that the proportion is 30%. Before they start a big advertising campaign, they conduct a hypothesis ..
1. explain the relationship between variance and standard deviation. can either of these be negative?expline2. find the
a health care worker wishes to see if the average number of family day care homes per county is greater than the
for each of the following distributions find the minimum usual value ? - 2? and the maximum usual value ? 2?.a.
You buy a lottery ticket to a lottery that costs $10 per ticket. There are only 100 tickets available to be sold in this lottery. In this lottery there are one $425 prize, two $105 prizes, and four $25 prizes. Find your expected gain or loss. (Rou..
Based on the scale of measurement for each variable listed below, which measure of central tendency is most appropriate for describing the data?
If you know the odds, you can find the probability by solving the preceding equation for odds for the probability. So, p^= odds/(odds + 1). If the odds of an outcome are 3 (or 3 to 1), what is the probability of the outcome?
The St. Maries plywood plant is part of the Potlatch Corporation's Northwest Division. The plywood superintendent organized a study of the tree diameters.
For each of the following examples, state whether the chi-square goodness-of-fit test or the chi-square test for independence is appropriate.
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