# Question

The number of pages printed before replacing the cartridge in a laser printer is normally distributed with a mean of 11,500 pages and a standard deviation of 800 pages. A new cartridge has just been installed.

a. What is the probability that the printer produces more than 12,000 pages before this cartridge must be replaced?

b. What is the probability that the printer produces fewer than 10,000 pages?

a. What is the probability that the printer produces more than 12,000 pages before this cartridge must be replaced?

b. What is the probability that the printer produces fewer than 10,000 pages?

## Answer to relevant Questions

Refer to Exercise 8.51. The manufacturer wants to provide guidelines to potential customers advising them of the minimum number of pages they can expect from each cartridge. How many pages should it advertise if the company ...The final marks in a statistics course are normally distributed with a mean of 70 and a standard deviation of 10. The professor must convert all marks to letter grades. She decides that she wants 10% A’s, 30% B’s, 40% ...The demand for a daily newspaper at a newsstand at a busy intersection is known to be normally distributed with a mean of 150 and a standard deviation of 25. How many newspapers should the news stand operator order to ensure ...X is an exponential random variable with λ = .3. Find the following probabilities.a. P(X > 2)b. P(X < 4)c. P(1 < X < 2)d. P(X = 3)Use the t table (Table 4) to find the following values of t.a. t.10, 15b. t.10, 23c. t.025, 83d. t.05, 195Post your question

0