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Find the critical value ta(alpha)/2 that corresponds to a confidence level of 95% and a sample size of 11.
a study of 24 graduates of four-year colleges revealed the mean amount owed by a student in student loans was 14381.
Given the variances of the two samples below, find the test value and the degrees of freedom that should be used in an F test.
Ball bearings are manufactured with a diameter of 5 mm. But the process has variation, so the diameter is normally distributed with a mean of 5 mm and a standard deviation of .02 mm. A) What proportion of ball bearings are more than 5.03 mm?
The waiting times have a standard deviation of 5.7 minutes. Use a 0.025 significance level to test the claim that with a single line, waiting times vary less than with individual lines.
how does the anova technique avoid the problem of the inflated probability of making type i error that would arise
A random sample of 49 employees took a computer literacy test. The sample resulted in a mean score of 75 with a standard deviation of 21. Estimate the standard error of the mean.
suppose we draw two tickets from a hat that contains tickets numbered 1234. let x be the 1st number drawn and y be the
the following games are played with 8 cards the four kings and the four aces. the dealer fans the cards with their back
At the 0.10 significance level, can we conclude that the annual rates of return are higher on the big board?
a student club has 40 members including stacy and tom.a in how many ways can the club elect different individuals to
If writing scores for population have standard deviation of σ = 20, does sample give adequate evidence to conclude that new composition course has significant effect?
Out of the 109 males, 42% preferred Pepsi and out of the 53 females, 40% preferred Pepsi. Pepsi wanted to test to determine if the males preferred Pepsi more than females.
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