In 2007, the mean price per pound of lobster in New England was $11.48 and the standard deviation was $2.12. A histogram of the data shows that the distribution is symmetrical. A local New England grocer is selling lobster for $8.99 per pound. What is this price in standard units? Assuming the Empirical Rule applies, would this price be considered unusual or not? Round to the nearest hundredth.
A)z = 1.17; This is unusually expensive lobster.
B)z = 1.17; This price would not be unusual.
C)z = - 1.17; This is unusually inexpensive lobster.
D)z = - 1.17; This price would not be unusual.

Question

Quizplus · Accepted Answer

The z-score is calculated as (8.99 - 11.48) / 2.12 = -1.17. According to the Empirical Rule, a z-score within -2 and 2 is not considered unusual.

In 2007, the Mean Price Per Pound of Lobster in New