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Tim has two more problems to solve on his test, but he doesn't know how long it will take to finish them. He assigns mutually irrelevant normal distributions to the times, assigning a mean of 35 minutes to the first problem and 30 minutes to the second problem. He assigns a 95% chance that the first problem will take 35+-15 minutes(i.e. between 20 and 50 minutes), and a 95% chance that the second problem will take 30+-20 minutes.
Which interval below contains 95% of the probability of the time it will take Tim to finish both problems?
a) 65 +- 17.5 minutes
b) 65 +- 25 minutes
c) 65 +- 30 minutes
d) 65 +- 35 minutes
To demonstrate the effectiveness of the drug, a researcher selects a sample of n = 25 children diagnosed with the disorder and measure each child's attention span before and after taking the drug.
Based on the information, what decision should the director make about the books used for the courses if the goal is to keep the cost below $300?
The estimated salary range is $4,500, the margin of error should be $100 and the desired level of confidence is 95%.
A consumer organization estimates that over a 1-year period 17 percent of cars will require to be repaired once, 7 percent will need repairs twice, and 4 percent will require three or more repairs. What is the probability that a car chosen at rand..
If 50 cups of coffee were measured, what is the probability that: The sample mean per cup is less than 7.8 ounces?
Determine regression line for predicting January temperature from latitude.
Suppose that the average annual salary for the worker in United States is $39,000.00 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $7,000.00.
The weights (in pounds) of a sample of five boxes being sent by UPS are: 12, 6, 7, 3, & 10.
Using your knowledge of infectious disease epidemiology, quantify the pattern of disease X in this group, i.e., what are the infectivity, pathogenicity, and virulence of disease X?
Use drinking as an excuse for outrageous behavior. including public nudity and dancing on tables. Find the standard error of this estimate. and interpret.
Four percent of DVD players manufactured by an electronics company are defective. Suppose six DVD players are randomly selected from the production line. Each DVD player is determined to be defective or non-defective.
Determine the probability that mean annual snowfall during 40 randomly picked years will exceed 111.8 inches?
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