HW# 10: Binomial
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Determine P(Y=30).
0
What are the possible values of Y?
integers from 0 to 25
What is the mean of Y?
10
What is the standard deviation of Y?
2.45
For the random variable X, how many trials are being performed? n =
25
For the random variable X, what is a "success"?
a negative value
For the random variable X, what is a "trial"?
a single draw
Use the binomial excel spreadsheet to determine P(Y=11).
0.1465
Also use the binomial excel spreadsheet to help you find P(Y<9). Note: this asks for < where the spreadsheet gives ≤
0.2735
For the random variable X, what is the success probability p?
0.36
