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1. In a typical day, 72% of people in the United States with internet access go...

1. In a typical day, 72% of people in the United States with internet access go online to get news

a) In a random sample of 5 people in the United States with internet access, what is the probability that the number going online to get news is less than 3?

b) In a random sample of 5 people in the United States with internet access, what is the probability that the number going online to get news is at least 3?

c) Does this satisfy the conditions of a binomial? YES or NO

d) What is a success?

e) What is the probability if success? P(S)=

f) How many trials are there?

g) For part a, what are the x values that would be less than 3?

h) For part b, what are the x values that would be at least 3?

i) Write a probability distribution:

j) What if we knew that the distribution of lengths of time a person spends online to get news was normally distributed with a mean of 22 minutes and a standard deviation of 4 minutes? Could you find the probability that a person spends more than 28 minutes going online to get news?

math   Statistics-And-Probability   
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