# Question

Although Microsoft Windows is the primary operating system for desktop and laptop PC computers, Microsoft’s Windows Phone operating system is installed in only 1.6% of smart phones (www. latimes.com/business/la-fi-google-mobile-20110817,0,6230477.story).

a. Assuming that 1.6% of all current smart phones have Microsoft’s Windows Phone operating system, using the binomial formula, find the probability that the number of smart phones in a sample of 80 that have Microsoft’s Windows Phone operating system is

i. Exactly 2

ii. Exactly 4

b. Suppose that 5% of all current smart phones have Microsoft’s Windows Phone operating system. Use the binomial probabilities table (Table I of Appendix C) or technology to find the probability that in a random sample of 20 smart phones, the number of smart phones that have Microsoft’s Windows Phone operating system is

i. At most 2

ii. 2 to 3

iii. at least 2

a. Assuming that 1.6% of all current smart phones have Microsoft’s Windows Phone operating system, using the binomial formula, find the probability that the number of smart phones in a sample of 80 that have Microsoft’s Windows Phone operating system is

i. Exactly 2

ii. Exactly 4

b. Suppose that 5% of all current smart phones have Microsoft’s Windows Phone operating system. Use the binomial probabilities table (Table I of Appendix C) or technology to find the probability that in a random sample of 20 smart phones, the number of smart phones that have Microsoft’s Windows Phone operating system is

i. At most 2

ii. 2 to 3

iii. at least 2

## Answer to relevant Questions

An office supply company conducted a survey before marketing a new paper shredder designed for home use. In the survey, 80% of the people who used the shredder were satisfied with it. Because of this high acceptance rate, ...Let N = 8, r = 3, and n = 4. Using the hypergeometric probability distribution formula, find a. P(x = 2) b. P(x = 0) c. P(x < 1) Bender Electronics buys keyboards for its computers from another company. The keyboards are received in shipments of 100 boxes, each box containing 20 keyboards. The quality control department at Bender Electronics first ...A commuter airline receives an average of 9.7 complaints per day from its passengers. Using the Poisson formula, find the probability that on a certain day this airline will receive exactly 6 complaints. Although Borok’s Electronics Company has no openings, it still receives an average of 3.2 unsolicited applications per week from people seeking jobs. a. Using the Poisson formula, find the probability that this company ...Post your question

0