# A town's January high temperatures average 36°F with a standard deviation of 10°, while in July the mean high temperature is 74° and the standard deviation is 8°. In which month is it more unusual to have a day with a high temperature of 55°?

##### 1 Answer

Mar 22, 2018

July

#### Explanation:

Find and compare the z-scores of January and July. The z-score formula is:

**January:**

**July:**

Since the z-score for July is