question 9 for ball credis Wte neay the answer sheet Porm &: Show how you avrive

Question

question 9

for ball credis Wte neay the answer sheet Porm &: Show how you avrived at your solution on t and be organized The National Health Interview Survey reports that 37% of telephone users landlines, and have switched completely to cell phone use. Suppose we 9. that 37% of telephone users. Find the probability that the sam ple contains exactly 5 users who have abandoned their landlines. Use the binomial probability formula. Write your answer with three decimal places. (5 points) al cula e data set represents the age of 15 college professors. 31, 37, 40, 42, 46, 51, 52, 56, 58, 59, 60, 62, 65, 69 ind the population mean and the population standard deviation. One decimal place ipoints) populahov) mean12 ulatioA

Explanation / Answer

Question 9

Here n = 13

p = 37% = 0.37

Now if X is the number of customers who switched to mobile phones from landlines

Pr(X = 5) = Pr( X= 5; 13; 0.37) = 13C5 (0.37)5 (1 - 0.37)8 = 0.221

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