Question
The amounts a soft drink machine is designed to dispense for each drink are normally distributed, with a mean of 12 fluid ounces and a standard deviation of 0.2 fluid ounce. A drink is randomly selected (a) Find the probability that the drink is less than 11.8 fluid ounces. (b) Find the probability that the drink is between 11.6 and 11.8 fluid ounces. (c) Find the probability that the drink is more than 12 5 fluid ounces Can this be considered an unusual event? Explain your reasoning. (a) The probability that the drink is less than 11.8 fluid ounces is (Round to four decimal places as needed.)
Explanation / Answer
From statistical software output,
a) 0.1587
b) 0.1359
c) 0.0062
Yes, this event is unusual because its probability is less than 0.05.