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In how many ways can a student answer an 8-question, true-false examination if (i) he marks half the questions true and half the questions false, (ii) he marks no two consecutive answers the same?
Random sample of 100 voters showed that 55 of those sampled will vote for her. Is it likely that her assertion is correct at the 0.05 level of significance?
at time 0 a box contains one pen and one pencil. at each time n after a item is chosen at random from the box and put
A medical school claims that more than 28% of its students plan to go into general practice. It is found that among a random sample of 130 of the school's students, 32% of them plan to go into general practice. Find the P-value for a test of the s..
Test, at the 5 percent level, the hypothesis that an earthquake is equally likely to occur on any of the 7 days of the week.
Explain finding value of test statistic and P-value also understand the result. At the .01 significance level can we compute that the mean fare has increased.
Suppose that the amounts that students at a college spend on textbooks this semester have a normal curve with mean µ = $360 and standard deviation s = $120.
In a three-cornered paint ball duel, A, B, and C successively take shots at each other till only one of them remains paint free. Once hit, a player is out of the game and gets no more shots.
Adult US women are known to have cholesterol levels that are N(189 mg/dL, 25 mg/dL). What % of US women would you expect to have cholesterol levels below 135?
A certain drug known to affect coordination can be administered in three ways: orally, by injection under the skin, or by injection into a vein. How many levels does each of the factors have
Conduct a complete analysis of variance of the helpfulness ratings data, including (if warranted) multiple comparisons of means.
The number of votes cast in favor of a controversial proposition is believed to be approximately normally distributed with mean 8,000 and standard deviation.
Consider the following two binomial experiments. In a binomial experiment consisting of six trials, how many outcomes have exactly one success and what are these outcomes?
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