Asurvey indicates that shoppers spend an average of 26 minutes with a standard deviation of 8 minutes in your store and that these times are normally distributed. find the probability that a randomly selected shopper will spend less than 20 minutes in the store.

0.2266

Step-by-step explanation:

Given that a  survey indicates that shoppers spend an average of 26 minutes with a standard deviation of 8 minutes in your store and that these times are normally distributed.

i.e. if X is the time spent in the store then X is

N(26, 8)

The probability that a randomly selected shopper will spend less than 20 minutes in the store

=

Required prob = 0.2266

b.an increase in a causes b to decrease

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