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According to a recent report from the U.S. National Center for Health Statistics, females between 25 and 34 years of age have a bell-shaped distribution for height, with mean of 65 inches and standard deviation of 3.5 inches.
a. Give an interval within which about 95% of the heights fall. explain
b. What is the height for a female who is 3 standard deviations below the mean? Would this be a rather unusual height? Why explain
John Wayne. Like a lot of other Americans, John Wayne died of cancer. But is there more to this story? In 1955 Wayne was in Utah shooting the film.
for a random sample of 50 measurements on the breaking strength of cotton threads the mean breaking strength was found
Suppose that Rules 1 and 2 are used simultaneously for the detection of out-of control conditions. Assuming independence of the rules, what is the overall probability of a type I error? Explain the meaning of a type I error in this context.
Find the probability that the mean weight of those loads is less than 42.00 tons. Assume that the variable is normally distributed.
what is the probability of obtaining at least 6 cases in this class if the nationwide rate holds True?
The mean was 56 and the standard deviation was 20. On the second exam, she scored 82; the mean was 74 and the standard deviation was 5. On which exam did she do better?
What null and alternative hypotheses should he have used? Explain, using both words and symbols. Explain the meaning of any symbols you use.
The structure of a two-factor study can be presented as a matrix with levels of one factor determining the rows and the levels of the second factor determining the columns. With this structure in mind, describe the mean differences that are evaluated..
The mean of the population was computed to be 126.9 grams and the standard deviation was 1.20 grams. Which food results in a more uniform weight?
It is important to look at data in a graphical form. Patterns are the essence of data exploration, and the eye's ability to discern forms and patterns makes visual display integral to the process.
Two types of phone operating system are being tested to determine if there is a difference in the proportions of system failures (crashes).
The TV Show "MythBusters" puts a popular myth to the test on each episode. If a myth involves fire, what is the chance that it will be verified as true
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