Management of Wonderland Toronto is keen to learn the mean spending per visitor at Wonderland. 596 customers were randomly selected, and spending per visit was recorded. Before estimation of the population mean using the sample mean, the management intends to assess whether the population of spending is normally distributed.

The Data

Number of Classes 8 Range $154 Class Width $19.25 (Initial) Class Width $20.00 (Final) Min $14 Max $168 Sample Mean 96.3204698 Sample SD 29.55842499 Lower Limit Upper Limit Observed Frequency (o) Probability Expected Frequency (e) (o - e)^2/e 10 30 5 30 50 26 50 70 79 70 90 138 90 110 158 110 130 106 130 150 56 150 170 28 Sample Size 596