A certain high school students taking a math assessment test had a mean score of 281 with a standard deviation of 34.4. Possible test scores ranged from 0 to 500. Assume that the scores are normally distributed. What is the probability that a student had a score higher than 315?

In Rapid City, SD, the mean number of days with 0.01 inch or more precipitation for May is 12. What is the probability that Rapid City has 18 days with 0.01 inch or more precipitation next May?

Questions 1 & 2 are attached. Thank you.

The number of times that an individual contracts a cold in a given year is a Poisson random variable with parameter = 5. Suppose a new wonder drug (based on large quantities of vitamin C) that has just been marketed reduces the Poisson parameter to = 3 for 75 percent of the population. For...

2. A quality control supervisor in a Coca-Cola cannery knows that the exact amount each can contains will vary, since there are certain uncontrollable factors that affect the amount of fill. The mean fill per can is important, but equally important is the variance of the fill. If 2 is large,...

a sign is suspended from two chains AE and BF. Knowing that the tension in BF is 200 N, determine (a) the moment about A of the force exerted by the chain at B

.AT THIS CONFIDENCE LEVEL IS IT POSSIBLE TO REJECT THE HYPOTHESIS THAT DOWNTIME EXPERIENCE IS SAME DURING EACH OF THESE 2 YEAR

Let N be the number of tosses of a fair coin up to and including the appearance of the first head. By conditioning on the result of the first toss, show that E(N) = 2.

In each of the following cases, indicate whether classical, empirical, or subjective probability is used. A. A baseball player gets a hit in 30 and out of 100 times at bat. The probability is .3 that he gets a hit in his next at bat. B. A seven member committee of students is formed to study...

Suppose a random sample of size 64 is drawn from a population with a mean of 277. If 90% of the time the sample mean is less than 280, what is the population standard deviation?