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Since the passage of the Staggers Rail Act of 1980, there has been an increase in the number of small railroads (Class III). Why has this number increased while the number of Class I railroads has decreased?
Using symbols state hypotheses (H 0 and H 1 ) for two-tailed test. Sketch suitable distribution and locate critical region for a = 0.05.
Construct a 95% confidence interval for the population mean.
Prepare a frequency distribution of ungrouped data including cumulative frequency (tally) for the table of approvedCalculate the mean, mode and median of the table of approved
according to a recent survey about 33 of americans polled said that they would likely purchase reusable cloth bags for
a candidate for one of ohios two u.s. senate seats wishes to compare her support among registered voters in the
Suppose that a failure of certain component follows the distribution f(x) = px(1 - p)x for x = 0, 1, and zero, elsewhere. How many components must one test in order that the sample mean X will lie within 0.4 of the true state of nature with probabili..
Simple random sample of 100 elements is taken: (a) What is the chance of an element being included in the sample? (b) What is this chance called (hint: not probability)?
What type of sampling was used here and what are the mean and standared deviation of the sample - Research to find the average height of all men in the United States.
A baseball player gets a hit in 30 out of 100 times at bat. What is the probability that he gets a hit in his next at bat?
Using an appropriate statistical test determine if there is a significant association between gender and satisfaction with the new initiative.
Calculate the margin of error that would be used to determine a 95% confidence interval for the mean pulse rate of all women.
A large population of metal rods have an average diameter of .943 inches with a standard deviation of .001 inches. The engineering specification for the rods requires that they be between .941 and .944 inches.
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