Complete the following:
Q1: Use the binomial probability formula to determine the probability of x successes in n trials:
n=12, x=5, p=0.25
0.103
0.082
0.091
0.027
Q2: The probability is 0.7 that a person shopping at a certain store will spend less than $20. For groups of size 22, find the mean number who spend less than $20.
14.0
6.6
15.4
6.0
Q3: A company manufacturers batteries in batches of 18 and there is a 3% rate of defects. Find the standard deviation for the number of defects per batch.
0.721
0.735
0.703
0.724
Q4: Use the Poisson Distribution to find the indicated probability.
The number of calls received by a car towing service averages 16.8 per day (per 24-hour period). After finding the mean number of calls per hour, find the probability that in a randomly selected hour the number of calls is 2.
0.08516
0.13383
0.12166
0.15208