68-95-99.7 Rule

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 $1.30 and $1.70 for a pint of frozen yogurt?

• a.)
• 68%
• b.)
• 34%
• c.)
• 95%
• d.)
• 99.7%