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Animal Gestation Periods The accompanying table also shows the gestation period (in days) for some animals. The gestation period is the length of pregnancy. Graph the gestation period and describe the distribution.
If there are any outliers, identify the animal(s) and give their gestation periods. If you were to include humans in this graph, where would the data point be?
The human gestation period is about 266 days.
Jack is doing a project in educational psychology. Before the experiment, he rank-orderes all his participants according to achievement test scores.
The heights were normally distributed, with a mean of 67.8 inches and a standard deviation of 4.0 inches. A study participant is randomly selected. Find the probability that his height is less than 65 inches.
useless airways advertises that on average its new york to london flight takes five hours and 30 minutes. the federal
An Olympic archer is able to hit the bull s-eye 80% of the time. Assume each shot is independent of the others. If she shoots 6 arrows, what's the probability of each of the following results?
Using a 0.01 level of significance, test the claim that the tutoring has a positive effect on the math scores. State the null and alternative hypotheses. Find d, d-, and sd. Note: It doesn't make any difference which row you subtract
in a premlinary test of the microsort method of gender selection 14 couples were treated and 1.3 of them had baby
A batch of 50 parts contains six defects. If two parts are drawn randomly one at a time without replacement.
From these we calculate = 129.44; = 122.65; sx = 9.15; sy = 11.02. Perform the test H0: against the alternative H1:, using the two sample t-test, and state any assumptions you may require to do this test.
For each customer, it records name, ID number, region of the country (1 = East, 2 = South, 3 = Midwest, 4 = West), date of last purchase, amount of purchase, and item purchased.
A multiple choice test consists of 25 questions with possible answers of a, b, c, d, and e. Estimate the probability that with random guessing, the number of correct answers is between 3 and 10 inclusive.
Determine the probability of fatal accident over a lifetime? Describe your reasoning carefully. Hint: Suppose independent events. Why might the supposition of independence be violated?
1.an experiment was conducted to determine the effects of three different pesticides p1p2p3 on the yield of three
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