PROBLEM 3 Eighty percent of computer parts last at most how long? SOLUTION Find the 80th percentile. Draw a graph. Let = the 80th percentile. k Solve for = ln(1 - .80) - 0.1 = 16.1 years k: k Eighty percent of the computer parts last at most 16.1 years. NOTE: TI-83+ and TI-84: On the home screen, enter LN(1 - .80)/-.1
PROBLEM 3 Eighty percent of computer parts last at most how long? SOLUTION Find the 80th percentile. Draw a graph. Let k = the 80th percentile. Solve for k: k = ln(1 - .80) - 0.1 = 16.1 years Eighty percent of the computer parts last at most 16.1 years. NOTE: TI-83+ and TI-84: On the home screen, enter LN(1 - .80)/-.1
5_4_the_exponential_distribution.docx