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In a high school graduating class of 100 students, 42 studied math, 68 studied psychology, 54 studied history, 22 studied both math and psychology, 7 studied history and neither math nor pyschology, 10 studied all three and 8 did not take any of the three subjects. What is the probability that the student takes math only?
If, 20 patients improved, 7 declined, and 3 remained the same, assess whether or not patients undergoing this treatment are showing significant change from baseline to 3 months afterward. Report a p-value.
What is the 90% confidence interval estimate of the difference between two population means.
Listed below are weights in grams from a sample of these bats. Construct a 95% confidence interval estimate of their mean weight.
Passengers using New York's MetroCard system must swipe the card at a rate between 10 and 40 inches per second, or else the card must be re-swiped through the card reader. Research shows that actual swipe rates by subway riders are uniformly distr..
The participants in a television quiz show are picked from a large pool of applicants with approximately equal numbers of men and women.
Professor Cox needs a volunteer amongst 30 students in his statistical applications course. The average age of his students is 25 years, with the standard deviation of 3 years.
Give the expected value and standard deviation of defective shoes in the ShoeFit store order.
ABC Corporation of California publishes a variety of statistics, including the number of individuals who got a new job during the past 12 months and the mean length of time the individuals have been on the job.
Graph the information using a histogram and a scatter plot in Excel as well. How does seeing the information in a graphical format provide more information?
Find the best predicted temperature (in degree F) at a time when a cricket chirps 3000 times in one minute. What is wrong with this predicted value?
A sample of n = 9 individuals was selected from a normally distributed population with a mean of µ = 25 and a standard deviation σ = 6. A treatment was administered to the sample and, after treatment, the nine individuals produced the following sc..
Formulate an appropriate hypothesis test to examine at the 10% level of significance whether the manager's worries are justified.
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