Probability-sample size and standard deviation

Reference no: EM1322579

To find the probability, sample size and standard deviation.

1) 20 students in a class - if there is a 15% probability that a randomly chosen member has seen a particular movie - what is the expected number of students have seen the movie?

a. Probability that none has seen the movie?

b. Probability that exactly 1 person has seen the movie?

c. Probability that exactly 3 people have seen the movie?

d. Probability that more than 5 people have seen the movie?

2) What is the standard deviation for the number of students seeing the movie based on the distribution?

3) You can be at least 99% certain that fewer than how many students saw the movie?

Reference no: EM1322579

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