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In a normal distribution with mean 30 and variance 25, at what percentile rank does a score of 42 fall?
Among twenty-five articles, nine are defective, six having only minor defects and three having major defects. Determine the probability that an article selected at random has major defects given that it has defects.
In a normal distribution with mean 3 and variance 49, what are the upper and lower limit scores for the middle 50% of the data?
Calculate an 85% confidence interval for the population mean number of wolf pups per den at southwestern United States (US).
Also include information about the number of participants you would assess and how you would go about estimating effect size and statistical power (when relevant).
The standard deviation of the time to complete the entire homework assignment
Compute expected value for each of three actions and find out if manager must accept, further analyze, or reject the lot? Determine expected value of perfect information (EVPI)?
what is the probability that at least 8 of the words on the test are words that the student knows?
A sample of 10 urgent and non-urgent patients was conducted to determine average wait time. The hospital wants to be sure that urgent patients do not wait as long as non-urgent patients. The following hypotheses have been formulated.
Determining probability when guessing answers. Test comprise of multiple- choice questions each having 4 possible answers (a, b, c, d) one of which is right. Suppose that you guess answers to six such questions.
Write up your results by using scientifically recognized form.
Suppose that you select a 50 families sample. Which is the form expected from the distribution of the average or median of the sample?
Construct a 95% confidence interval on the population mean for the following sample data set:
Find out z values for 29 and 34 hours. What percent of garages take between 32 hours and 34 hours to erect?
Data collected by a child development scientist produced a 95% confidence interval for the mean age, μ (in weeks) at which babies began to craw as [21.4, 31.6]
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