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On a December day, the probability of snow is .30. The probability of a "cold" day is .50. The probability of snow and "cold" weather is .15. Are snow and "cold" weather independent events? A. only if given that it snowed b. no c. yes d. only when they are also mutually exclusive e. None of the above answers is correct.
Suppose a study is conducted to test the claim, at a 0.01 significance level, that less than 75% of college students spend less than $250 per semester on text books. A survey of 700 students found that 71% spent less than $250 per semester on text..
The lead time is 2 weeks.If you were asked to create an (R,s,S) policy for this, what parameters would you pick? Give your reasons.
An urn contains 8 green balls, 5 red balls, and 7 white balls. How many ways are there to draw a green ball or a red ball?
Suppose the following statistics were calculated from data gathered from a randomized block experiment with k = 4 and b = 10:
Find the probability that the mean wieght of these 400 bags exceeds 16.6 ounces.
To find the probability values in case of raw data, binomial, normal
A small New England college has a total of 400 students.The Math SAT is required for admission, and the mean score of all 400 students is 620. The population standard deviation is found to be 60. The formula for a 95% confidence interval yields th..
Find how large a sample must be drawn in order to be 90 percent confident that the sample mean will not differ from the population mean by more than 3.7 pounds.
The law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable-one three digit number wins $600 and all others win nothing-that gamblers never reach "the long run".
Round the intermediate values to 2 decimal places. Round your answer to 2 decimal places, the tolerance is +/-0.05. Type of music preferred is independent or not independent of region of the country?
Find a 95% confidence interval for the mean of all drinks dispensed by this machine if a random sample of 36 drinks has an average content of 2.25 deciliters.
Stalnaker technique: what effect does the independent variable have on the dependent variable? type of hypothesis? what is independent variable? dependent variable?
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