Find warranty period (in days) for a washing machine whos average (mean) life is 6 years and standard deviation of 2.5 years. Assume 365 days in a year.

1 answer

6 * 365 = 2190 days

2.5 * 365 = 912.5 days

What criterion are they using for the warranty? Mean? Mean + 1 SD? Mean + 2 SD?