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Dick hits a bull's eye 90% of the time and sally hits a bull's eye 95% of the time. What is the probability that either one or both will hit the bull's eye if each takes one shot? What is the probability that dick ans sally will both hit the bull's eye?
Let X be normally distributed random variable with μ = 100 and σ = 10. Find the probability that X is between 75 and 100.
If she performs 15 demonstrations this week, what is the probability of her being satisfactory? What is the probability of between 4 and 8 (inclusive) orders?
A survey on the drinking habits of Americans estimated the percentage of adults across the country who drink beer, wine, or hard liquor at least occasionally. Of the 1516 adults interviewed, 985 said that they drank.
If the average low temperature of a winter month in Rochester, NY, is 16° and the standard deviation is 4.6 then according to Chebyshev's theorem, the percentage of average low temperatures in Rochester, NY, between 2.2° and 29.8° is %.
In a random sample of 16 mountain climbers who are going to attempt Mt. McKinley what is the probability of each of the following All 16 reach the summit.
A sample of 65 observations is selected from one population with a population standard deviation of 0.75. The sample mean is 2.67.
Determine the area under the standard normal curve between z = 0 and z = 3. Determine the area under the standard normal curve to the right of z = 1. Determine the area under the stanard normal curve to the left of z = 1.5
You and 100 of your 200 respondents concerned about nutrition. Is this reason to believe that the percent in your area is higher than the national 40%?
A diet is being developed which must contain at least 100 mg of vitamin C. Two fruits are used in this diet. Bananas contain 30 mg of vitamin C and Apples contain 20 mg of vitamin C. The diet must contain at least 100 mg of vitamin C. Which of the..
Explain finding value of test statistic and P-value also understand the result. At the .01 significance level can we compute that the mean fare has increased.
Find the pdf of X+Y - Two independent uniform random variables
Marconi Shipping Company packages their shipments in 50 ton containers. History has shown that the shipping department reports that the distribution of container weights follows the normal distribution
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