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Question: Who talks more-women or men? According to Louann Brizendine, author of The Female Brain, women say nearly three times as many words per day as men. Skeptical researchers devised a study to test this claim. They used electronic devices to record the talking patterns of 396 university students who volunteered to participate in the study. The device was programmed to record 30 seconds of sound every 12.5 minutes without the carrier's knowledge. According to a published report of the study in Scientific American, "Men showed a slightly wider variability in words uttered. But in the end, the sexes came out just about even in the daily averages: women at 16,215 words and men at 15,669."56 This difference was not statistically significant. What conclusion can we draw from this study? Explain.
Five cards are drawn from an ordinary deck without replacement. Find the probability of getting:
The task will take between 8 minutes & 11 minutes. Find this probability. The engineer would also like to know what the time is such that 40% of the task times are less than this value.
A single observation of a random variable having a geometric distribution is to be used to test the null hypothesis that its parameter equals θ0 against the alternative that it equals θ1 > θ0. Use the Ney man-Pearson lemma to find the best critica..
The price of XYZ Corporation stock is normally distributed all through the year with mean of $42.00 per share and a standard deviation of $2.25 per share. Suppose that the stock is traded 240 days out of the year.
Begin by identifying a potential research topic/issue of personal interest as the basis for a fictitious study.
What is the probability of winning if the rules are changed so that in addition to selecting the correct five numbers, you must now select them in the same order they are drawn?
an instructor stated at the beginning of a course that on the average 35 of students do not pass the exam. after the
For the random processes of Examples 10.3, 10.4, 10.5, and 10.6, identify whether the process is discrete-time or continuous-time, discrete-value or continuous-value.
Calculate the least squares estimate of and What's the first row, second column entry of ? (Round to the nearest fourth decimal)
the positioning of nests in shrubs was noted for a species of bird. use the data shown to determine if there was a
suppose babsie generated the following probability distribution px 5 .25 7 .30 10 .25 12 .05 15.is this probability
Conduct a hypothesis test to determine whether the whisper number justifies a conclusion of a statistically significant increase in the consensus estimate of economists. Use a = .01 as the level of significance.
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