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Suppose you were presented with the following summary of study results comparing a vegetarian diet to a meat diet. You are told 160 volunteers were randomly assigned to the two diets so that 80 were on the vegetarian diet and 80 were on the meat diet. At the end of 4 months, blood pressures are checked and an average difference of 12 mm Hg in mean systolic blood pressure is found between the two groups. The investigator reports that a two sample t-test shows this difference is statistically significant.
From the above statement what additional information would be helpful?
Use the Bonferroni procedure to make the post hoc test. In which week do we first see significant differences compared to baseline?
Tuition 2008, part 2. Exercise 51 examined the relation- ship between the tuition charged by states for four-year colleges and universities compared to the tuition for two- year colleges. Now, examine the relationship between private and public fo..
the snappy service gas station manager is thinking about a promotion that she hopes will bring in more business to the
A roulette wheel has 38 slots, numbered 0, 00, and 1 to 36. The slots 0 and 00 are colored green, 18 of the others are red, and 18 are black.
Systematic random samples are often used at the last stage of a multistage sample to choose a sample of apartments in a large building
the horn on an auto operates on demand 99 of the time. assume that each time you hit the horn it works or fails
answer each question with a minimum of 40 words per question1the poisson distribution can be a reasonable approximation
Given the current situation, estimate the probability that on a peak day, at least one faculty member with a sticker will be unable to find a spot - Compare these policies with regard to expected daily costs, expected number of units Short per day..
Assume the following: .05 level of significance; three samples; 27 cases SSB = 13; SSW = 23
An auditor selected a random sample of 12 accounts from all accounts receivable of a given firm. The amounts of the accounts, in dollars, are as follows.
In other words, for every 10,000 "person-years" of women taking the hormones instead of a placebo, there would be eight additional cases of invasive breast cancer. Discuss practical versus statistical significance in this situation.
a medical researcher wishes to determine the percentage of females who take vitamins. he wishes to be 95 confident that
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