Lesson 10.5: Standard Deviation Answers

Which weights are within 2 standard deviations of the mean? Select three options.

Bryant collects a set of 20 values that represent the lengths of worms he found in the garden. The variance of the set of values is 36.What is the standard deviation from the mean? Round the answer to the nearest tenth if necessary.

Raquel and Van live in two different cities. As part of a project, they each record the lowest prices for a gallon of gas at gas stations around their cities on the same day. Raquel’s data show and . Van’s data show and .Which statement is true about their gas-price data?

The graph shows a distribution of data.

Each histogram represents a set of data with a median of 29.5. Which set of data most likely has a mean that is closest to 29.5?

The graph shows a distribution of data.

Grace is looking at a report of her monthly cell-phone usage for the last year to determine if she needs to upgrade her plan. The list represents the approximate number of megabytes of data Grace used each month.700, 735, 680, 890, 755, 740, 670, 785, 805, 1050, 820, 750

Which statements are true about a histogram with one-minute increments representing the data? Select three options.

The histogram shows the weekly rates charged by different daycares for a 2-year-old child.

The mean shoe size of the students in a math class is 7.5. Most of the shoe sizes fall within 1 standard deviation, or between a size 6 and a size 9.