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George purchased 55 shares of a stock at $52.41 and sold them for $61.68.
a) What was his profit or loss?
b) If the broker charges 2.4% in commission of the total sale price, what was the broker's commission?
Raw scores on behavioral tests are often transformed for easier comparison. A test of reading ability has mean 70 and standard deviation 10
You work at a hospital that has always had about 100 emloyees staffed at night. You think that the number of employees staffed at night has recently decreased and would like to test this claim.
Determine whether the method of delivering teaching influences adherence with antiretroviral therapy.
What is the probability that a service call takes more than 30 minutes? (Be sure to indicate the relevant Z-score for the problem).
Kind of examination produced significant main effects on both mean mark and time taken to complete the examination.
Community college spends each year. If she wishes to be 90% confident, how large a sample is necessary if the standard deviation is known to be $80?
a. For thesedata, X2=6.0. What is its df value, and what is its approximate sampling distribution, if Ho is true?
An article (P. Kitchen, Retirement Plan: To Keep Working, Newsday, September 24, 2003) discussed the retirement plans of Americans ages 50 to 70.
Jeweller desires to know how many of each item to make each week to maximize profit. Create the integer programming model for this problem (written in format similar to way Problems 1 and 2 were presented).
Find a number m such that if five dice are rolled, the probability that the total number of spots showing is m or more is the same as this probability.
Find the output autocorrelation in terms of the input autocorrelation. -- Find the output PSD in terms of the input.
Is there sufficient evidence at the 5% level of significance to validate Coca-Cola's claim?
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