and 24 9. The probab poor (d) betw poo (e) at l type O-negative is between 18 t0
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Question
and 24 9. The probab poor (d) betw poo (e) at l type O-negative is between 18 t0. The probability that the number of tornadoes the month of May is between 30 and 40, inclusive han 20 people want to see the 11. The probability that more t mor Wh 24. Sne Universi individu Suppose selectecd marriage tax penalty abolished fe 12. The probability lity that fewer than 40 households have a I4. zae probability that fewer than 35 people support the privatization of Social Security pet 13. The probab bill proposing to extend daylight savings time ility that more than 500 adult Americans support a In Problems 15-20, compute P(x) using the binomial probability formula. Then determine whether the normal distribution can be used as an approximation for the binomial distribution. If the exact probability 15, n 60, p = 0.4, x = 20 16, n = 80,p 0.15, x 18 17, n 40, p = 0.25, x = 30 18, n 100, p = 0.05, x = 50 19, n 75, p 0.75, x 60 20, n=85, p = 0.8, x = 70 (a) Use so, approximate Plx) and compare the resuli to exa (b) Use few (c) Wo mor Wh 25. Mal Survey males b (Unma at home random years, a APPLYING THE CONCEPTS 21. On-Time Flights According to American Airlines, Flight 215 from Orlando to Los Angeles is on time 90% of the time. Randomly select 150 flights and use the normal approximation to the binomial to (a) approximate the probability that exactly 130 flights are on time. (b) approximate the probability that at least 130 flights are on (a) Ap in a ass (b) Do time. e) approximate the probability that fewer than 125 flights are on time. (d) approximate the proba inclusive, are on time. 22. Smokers According to Informatinu of adult smokers st 26. Fen ts, SurveyExplanation / Answer
15. n = 60, p = 0.4, x = 20
We need to find p( x = 20)
TI - 84 calculator Go to 2ND VARS > DISTR > binompdf (
Then enter values :
trials : 60
p = 0.4
x value = 20
Calculate
We get p ( x = 20) = 0.0616.
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