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Roger has read a report that the weights of adult mail Siberian tigers have a distribution which is approximately normal with mean μ = 390 lb and σ = 65 lb.
a) Find the probability that an individual male Siberian tiger will weigh more than 450 lb.
b) Find the probability that a random sample of 4 male Siberian tigers will have a sample mean weight more than 450 lb.
Labor negotiations estimate that 30 percent of all major contract negotiations result in a strike. During the next year, 12 major contracts must be negotiated. Determine the following probabilities.
A committee of three is selected at random from a set consisting of five Democrats, eight Republicans, and two Independents.
Eighty-eight shoppers were interviewed at random, and 59 said that they prefer to shop alone. What is the value of q-hat?
Calculate the population mean and population standard deviation.
Report descriptive statistics, assumptions tests, effect sizes (partial eta) as well as tests of statistical significance.
We recalculated our comparison of ideal number of children, this time only for women, separating them into two groups, those who indicated that they were "very happy" or "not at all happy" with life.
What is the expected shape of the distribution of the sample mean?
Assume the likelihood that any flight on Northwest Airlines arrives within 15 minutes of the scheduled time is 0.90. We choose four flights from yesterday for study.
Derive the standard error of proportion, the margin error and the 95% confidence interval for the proportion indicating preference to flirting.
An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of two emails per hour. Suppose the arrival of these emails is approximated by the Poisson distribution.
Confidence interval for the population mean - Prepare a 99% confidence interval for the population mean.
A year ago, Air Force implemented new test for finding which candidates are most probable to become successful pilots. Now they wish to see if implementing pilot predictor test was a good idea. Scores have been standardized to facilitate comparis..
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