Extensive records are kept of the life spans (in months) of a certain product, and a relative frequency histogram is constructed from the data, using areas to represent relative frequencies. It turns out that the upper boundary of the relative frequency histogram is approximated closely by the graph of the function

Determine the probability that the life span of such a product is between 30 and 50 months.

Transcribed Image Text:

f(x) = 1 8V/2T te (1/2)[(x-50)/81²