# Question: Over the past decade the mean number of hacking attacks

Over the past decade, the mean number of hacking attacks experienced by members of the Information Systems Security Association is 510 per year with a standard deviation of 14.28 attacks. The number of attacks per year is normally distributed. Suppose nothing in this environment changes.

a. What is the likelihood this group will suffer an average of more than 600 attacks in the next 10 years?

b. Compute the probability the mean number of attacks over the next 10 years is between 500 and 600.

c. What is the possibility they will experience an average of less than 500 attacks over the next 10 years?

a. What is the likelihood this group will suffer an average of more than 600 attacks in the next 10 years?

b. Compute the probability the mean number of attacks over the next 10 years is between 500 and 600.

c. What is the possibility they will experience an average of less than 500 attacks over the next 10 years?

**View Solution:**## Answer to relevant Questions

An economist uses the price of a gallon of milk as a measure of inflation. She finds that the average price is $3.50 per gallon and the population standard deviation is $0.33. You decide to sample 40 convenience stores, ...Use Appendix B.5 to locate the value of t under the following conditions.a. The sample size is 15 and the level of confidence is 95%.b. The sample size is 24 and the level of confidence is 98%.c. The sample size is 12 and ...The National Collegiate Athletic Association (NCAA) reported that the mean number of hours spent per week on coaching and recruiting by college football assistant coaches during the season was 70. A random sample of 50 ...A film alliance used a random sample of 50 U.S. citizens to estimate that the typical American spent 78 hours watching videos and DVDs last year. The standard deviation of this sample was 9 hours.a. Develop a 95% confidence ...In a sample of 200 residents of Georgetown County, 120 reported they believed the county real estate taxes were too high. Develop a 95% confidence interval for the proportion of residents who believe the tax rate is too ...Post your question