Questions from Applied Statistics

Q: “There is a 25% chance that AT&T Wireless

“There is a 25% chance that AT&T Wireless and Verizon will merge.”

Q: “Commercial rocket launches have a 95% success rate.”

“Commercial rocket launches have a 95% success rate.”

Q: “The probability of rolling three sevens in a row with dice

“The probability of rolling three sevens in a row with dice is .0046.”

Q: Which of the following could not be probability distributions? Explain.

Which of the following could not be probability distributions? Explain.

Q: Find the mean and standard deviation of four-digit uniformly distributed

Find the mean and standard deviation of four-digit uniformly distributed lottery numbers (0000 through 9999).

Q: The ages of Java programmers at SynFlex Corp. range from 20

The ages of Java programmers at SynFlex Corp. range from 20 to 60. (a) If their ages are uniformly distributed, what would be the mean and standard deviation? (b) What is the probability that a random...

Q: List the X values that are included in each italicized event.

List the X values that are included in each italicized event. a. You can miss at most 2 quizzes out of 16 quizzes (X = number of missed quizzes). b. You go to Starbuck’s at least 4 days a week (X = n...

Q: Use Excel to find each probability. a. P

Use Excel to find each probability. a. P(80 < X < 110) for N(100, 15) b. P(1.50 < X < 2.00) for N(0, 1) c. P(4,500 < X < 7,000) for N(6000, 1000) d. P(225 < X < 450) for N(600, 100)

Q: Write the probability of each italicized event in symbols (e.

Write the probability of each italicized event in symbols (e.g., P(X > 5). a. At least 7 correct answers on a 10-question quiz (X = number of correct answers). b. Fewer than 4 “phishing” e-mails out...

Q: Find the mean and standard deviation for each binomial random variable:

Find the mean and standard deviation for each binomial random variable: a. n = 8, π = .10 b. n = 10, π = .40 c. n = 12, π = .50