The following graph portrays the distribution of the number of spicy chicken sandwiches sold at a nearby Wendy’s for the last 141 days. The mean number of sandwiches sold per day is 91.9 and the standard deviation is 4.67. (Round your answers to 2 decimal places.)
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Homework Answers
from empirical rule 68% values are 1 std deviation from mean
a) therefore 68% of the days ; sales will be between 91.9-/+4.67 =87.23 and 96.57
b)on 95% of the days ; sales will be between 91.9-/+2*4.67 =82.56 and 101.24
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