Question 908974: (a)A supplier of company X makes on an average of 5 defective pieces. The company accepts a sample if there are no more than 7 defective pieces. What are the chances that the company will reject the sample?
(b)The chances of Anne winning a game are 55%. What is the probability of Anne winning the game in 3rd trial?
(c)The chances a customer will make a purchase is 60%. Then the probability of 5th purchase in 12th customers is
(d)The mean temperature in a city is 25°C and the standard deviation is 3°C in the month of April. Assuming this data is normally distributed, how many days in April would you expect the mean temperature to be between 22°C and 28°C?
Answer by ewatrrr(24785)   (Show Source):
You can put this solution on YOUR website! Recognizing Probability Distribution:
a)Poisson Distribution (average)
b)Binomial Distribution (winning 0r Losing)
c)Binomial Distribution (buying or not buying)
d)Normal Distribution (mean and sd)
Answering the various examples of Probability Distributions:
a)P(x > 7) = 1 - poissoncdf(5,7) = .1334 0r 13.34%
b)p(winning) = .55, n = 3, P(x = 1) = binompdf(3, .55,1)= .3341, .3341/(3C1) = .1114, winning on 3rd try
c)p(purchase) = .60, n = 12, P(x=5) = binompdf(12, .60, 5)= .1009/(12C5), 12th customer makes 5th purchase
d)P(22 < x < 28) = nomalcdf(22,28,25,3)
nomalcdf(22,28,25,3)x30days is the number of days
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