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We randomly choose letters, one at a time, without replacement, from the word CHOOSE until both Os have been obtained. What is the variance of the random variable? The answer should be 14/9.
a statistician selected a sample of 16 accounts receivable and determined the mean of the sample to be 5000 with a
Based on the empirical data determine the following probabilities:
what is the f ratio? why is the computation of the f ratio based on mean squares instead of sums of
A random sample of 15 paired observations has a correlation of -.46. Can we conclude that the correlation in the population is less than zero? Use the .05 significance level.
A random sample of 10 shafts has an average diameter of 0.2545 inches. a) Construct a 99% confidence interval of the true mean
Flaws in a certain type of drapery material appear on the average of one in 150 square feet. If we assume the Poisson distribution, give the probability of at most one flaw in 225 square feet.
With the sample standard deviation of 12 lbs. Determine the 90% confidence interval of true mean weight of all college wrestlers.
Mean of 61 minutes and a standard deviation of 9 minutes. Find the proportion of runners who take more than 70 minutes to finish. Draw a sketch to show this proportion.
a time for the 100-meter spring of 15.1 seconds at a school where the mean time for the 100-meter sprint is 17.6
Provide an example of an application of the normal distribution. Explain why standard normal distribution can be used to find the probabilities for all normal distributions?
the monthly starting salaries of students who receive an mba degree have a standard deviation of 110. what size
the supreme court has said that z-scores beyond z 2 or 3 are generally convincing statistical evidence. for a
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