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In the United States, a full-time employee works an average of 40 hours a week with a standard deviation of 2.5 hours per week. What percentage of employees work less than 35 hours a week?
in june an investor purchased 250 shares of oracle an information technology company stock at 20 per share. in august
One flight daily to a certain destination. The following information shows the probability distribution of late arrivals for that flight in the past month:
Distribution and the method of moments estimators of the parameters are alpha(hat)= 5.23 and lambda(hat) = 21.3. Find an asymptotic 95% confidence interval for alpha.
What is/are the advantage(s) of conducting a study with three or more levels of independent variables?
What is the probability that none of the next eight customers who order beer will order light beer? What is the probability that one customer will? What is the probability that two customers will?
John runs a computer software store. He counted 130 people who walked by his store in a day, 59 of whom came into the store. Of the 59, only 24 bought something in the store.
Suppose a reading between 30 and 40 is called very interesting from an archaeological point of view. Let us say you take readings at n=12 sites chosen at random.
The trial failed to show significance. How many subjects would be required to detect the difference in proportions observed in the trial with 80% power?
Suppose you were to cut up the directory and pull out one listing at random to contact.
Die with 4 sides {1, 2, 3, 4} is tossed 2 times. Let X equal maximum of two observations and let Y equal minimum. Determine joint pmf of X and Y, and correlation coefficient. Are X and Y independent?
For the statement: The mean amount of Pepsi in cans is at least 12 oz. Express the null hypothesis and the alternative hypothesis in symbolic form.
The number of messages sent to a computer bulletin board is a Poisson random variable with a mean of 5 messages per hour.
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