68-95-99.7 Rule

Question

Identify the percent of data that is between two values using a given standard deviation, mean, and the 68-95-99.7 rule. At a nearby frozen yogurt shop, the mean cost of a pint of frozen yogurt is $1.50 with a standard deviation of $0.10. Assuming the data is normally distributed, approximately what percent of customers are willing to pay between $1.40 and $1.60 for a pint of frozen yogurt? a.) 99.7% b.) 34% c.) 95% d.) 68%

Answer 1

d) 68%

1.5+/-.1 is within 1 standard deviation from the mean

(1.4, 1.6)