binomial probability distribution involves 60 trials with a probability of failure of 0.26. Find the standard deviation of this probability distribution

Company XYZ know that replacement times for the portable MP3 players it produces are normally distributed with a mean of 2.5 years and a standard deviation of 0.8 years.Find the probability that a randomly selected portable MP3 player will have a replacement time less than 0 years?

The time to occurrence of coronary artery disease in Iowa is heavily right skewed with a mean of 45 and standard deviation of 16. A random cohort of 64 Iowans has been selected and followed till the occurrence of coronary artery disease. Calculate the approximate probability that the sample mean time that coronary artery disease occurs is beyond 47 years.

The time to occurrence of coronary artery disease in Iowa is heavily right skewed with a mean of 45 and standard deviation of 16. A random cohort of 64 Iowans has been selected and followed till the occurrence of coronary artery disease. What is the approximate probability that the sample mean time that coronary artery disease occurs is beyond 47 years?

CNNBC recently reported that the mean annual cost of auto insurance is 1013 dollars. Assume the standard deviation is 230 dollars. You take a simple random sample of 62 auto insurance policies. Find the probability that a single randomly selected value is less than 998 dollars. P(X Next Question

The average number of miles (in thousands) that a car's tire will function before needing replacement is 67 and the standard deviation is 19. Suppose that 47 randomly selected tires are tested. Round all answers to 4 decimal places where possible and assume a normal distribution. If a randomly selected individual tire is tested, find the probability that the number of miles (in thousands) before it will need replacement is between 63 and 66.4. ? For the 47 tires tested, find the probability that the average miles (in thousands) before need of replacement is between 63 and 66.4?

CNNBC recently reported that the mean annual cost of auto insurance is 1002 dollars. Assume the standard deviation is 291 dollars. You take a simple random sample of 72 auto insurance policies.Find the probability that a single randomly selected value is less than 988 dollars.P(X < 988) = Find the probability that a sample of size n=72n=72 is randomly selected with a mean less than 988 dollars.P(M < 988) = Enter your answers as numbers accurate to 4 decimal places.

CNNBC recently reported that the mean annual cost of auto insurance is 973 dollars. Assume the standard deviation is 234 dollars. You take a simple random sample of 61 auto insurance policies. Find the probability that a single randomly selected value is less than 991 dollars.P(X < 991) =  Find the probability that a sample of size n=61n=61 is randomly selected with a mean less than 991 dollars.P(M < 991) =

The number of sick days used yearly by employees at a company had a distribution with a mean of 7 and a standard deviation of 2.  Find the probability that the mean number of sick days used by a random sample of 34 employees exceeded 6.5 days.