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A computer repair shop gets computers on regular basis for repairs. The repair time between two computers is exponentially distributed with mean time between repairs of two computers being 2 hours. Find the conditional probability that a repair of a computer takes at least 10 hours given that duration of the repair exceeds 9 hours. Re-compute the answer if distribution of repair time is assumed to be uniformly distributed between 0 and 20 hours.
A college class believes that the average grade average of psychology students and the average grade averages of biology students are different.
As part of the National Health and Nutrition Examination Survey, the Department of Health and Human Services obtained self-reported heights and measured heights for males aged 12-16. All measurement is in inches. Listed below are sample results.
What statistical procedure was used to analyze data in study B, how many groups were compared in study B, how many subjects were enrolled in Study C and which study demonstrated the greatest level of statistical significance?
Steve Goodman, production foreman for the Florida Gold Fruit Company, estimates that the average sale of oranges is 4,700 and the standard deviation is 500 oranges. Sales follow a normal distribution.
Carry out suitable multiple comparison procedure to determine the source of the difference.
for each class interval of the frequency distribution given determine the class midpoint the relative frequency and
The total blood cholesterol concentrations, in mg/dL, are shown below for a random sample of six people. In the table below, x is the age of the subject and y is the subject's total cholesterol concentration. Find the 95% prediction interval when ..
He notices that 21 of the throws come up 7. State the null and alternative hypothesis, and find the P-value of his observations.
w. edwards deming in his red bead experiment had a box of 4000 beads of which 800 were red and 3200 were white.
Fix-It Copiers advertises mean time of 100 minutes for office calls with standard deviation of 25 minutes. What percentages of calls are completed?
In Part A of this assignment, you selected a random sample of 30 StatCrunch U students and created a StatCrunch file containing data from the above survey for those students. You will use the StatCrunch data file you created in Part A to complete thi..
Faced with rising Fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below.
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