Find the mean and variance for the binomial distribution , P=0.72 and n=26 Round to two decimals
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P=0.72 and n=26
Round to two decimals
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- Fourty percent of the students in a class of 120 are planning to go to graduate school Find the variance of the binomial distribution.The life of light bulbs is distributed normally. The variance of the lifetime is 225 and the mean lifetime of a bulb is 540 hours. Find the probability of a bulb lasting for between 532 and 571 hours. Round your answer to four decimal places.The time spent waiting in the line is approximately normally distributed. The mean waiting time is 4 minutes and the variance of the waiting time is 9. Find the probability that a person will wait for less than 7 minutes. Round your answer to four decimal places.
- Explain why P(X = 2) = P(X = 3) in a binomial distribution where n = 5 and p = 0.5.The time spent waiting in the line is approximately normally distributed. The mean waiting time is 4 minutes and the variance of the waiting time is 1. Find the probability that a person will wait for more than 5 minutes. Round your answer to four decimal places.The weights of steers in a herd are distributed normally. The variance is 40,000and the mean steer weight is 1000lbs. Find the probability that the weight of a randomly selected steer is greater than 600lbs. Round your answer to four decimal places.
- Assume that people playing World of Warcraft in a week has a normal distribution with a mean of 54 hours and a standard deviation of 11 hours. Find the probability that a randomly selected person played more than 89 hours. Round to four decimals places.The weights of steers in a herd are distributed normally. The variance is 10,000 and the mean steer weight is 1100lbs. Find the probability that the weight of a randomly selected steer is between 919 and 1180lbs. Round your answer to four decimal places.The life of light bulbs is distributed normally. The variance of the lifetime is 900 and the mean lifetime of a bulb is 550 hours. Find the probability of a bulb lasting for at least 583 hours. Round your answer to four decimal places
