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Archaeologists use pelvic bones to determine whether a skeleton is that of a man or woman. Primitive cultures often buried their outstanding members (rulers, warriors, athletes, and so on) with greater ceremony than ordinary members. Using this fact, much can be learned about the status of women in an early culture by observing the frequency of skeletons of females in ceremonial graves. Suppose that an archaeologist discovers 20 graves that can be assumed to be a random sample of the ceremonial graves of a Stone Age culture in Wiltshire, England.
a. What is the most logical statistical hypothesis to be tested?
b. Suppose the region of rejection is: The number of skeletons of females is less than 8. What is the value of a?
c. Suppose pa ¼ 0.30; what is the numerical value of b?
d. What assumption is necessary to use this test procedure?
Picking melons. Two stores sell watermelons. At the first store the melons weigh an average of 22 pounds, with a standard deviation of 2.5 pounds.
what is the probablity that a person selected at random from this hwas data set is horter than 65 or taller than
This problem involves calculating and interpreting the 95% confidence interval for a proportion. While you can use SPSS to determine proportions, you need to calculate the confidence interval by hand.
F (x) : 2. Find mean , variance 2; and standard deviation Of continuous r.v. Let X equal weight of a randomly selected quarter-pounder in pounds. What is P (0:20
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The level of significance indicates the probability of rejecting a false null hypothesis.
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A certain disease occurs in 35% of the population. A test for the disease is fairly accurate: it misclassifies people with the disease as healthy 6% of the time and reports that a healthy person is diseased just 7% of the time.
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What is the probability that at least 12 are first-time offenders? What is the probability that between 7 and 10 (inclusive) are first-time offenders
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Is the distribution skewed or symmetrical? If skewed, is it skewed positively or negatively?- Construct a stem and leaf diagram with the last digit being a leaf and the first digit a stem. Repeat stem values five times.
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