Studies have shown that bats can consume an average of 10 mosquitoes per minute. Assume that the number of mosquitoes consumed per minute follows a Poisson distribution. What is the probability that the time between eating mosquitoes is more than 15 seconds (round your answer to four decimal places)?

1 points

QUESTION 7

According to a Statistics Office, it takes an average of 22 weeks for someone over 55 to find a new job. Assume that the probability distribution of time taken to find a new job is normal and that the standard deviation is 2 weeks. What is the probability that it takes a worker over the age of 55 more than 19 weeks to find a job (round your answer to four decimal places)?

1 points

QUESTION 8

Assume that IQ scores follow a normal distribution with a mean of 100 and a standard deviation of 16. What is the probability that an individual scores more than 68 (round your answer to four decimal places)?

1 points

QUESTION 9

Scores on a marketing exam are known to be normally distributed with mean and a standard deviation of 60 and 20, respectively. What is the probability that a randomly selected student scores between 20 and 40 (round your answer to four decimal places)?

1 points

QUESTION 10

A prankster plans to detonate some fireworks outside his neighbours' house. Fireworks have a loudness that is normally distributed with a mean of 160 Db and standard deviation of 10 Db. In order to achieve the desired effect and scare his neighbour the fireworks will have to exceed 180 Db. What is the probability that the prank will be successful (180 Db and up) (round your answer to four decimal places)?