Line of Best Fit

Question 1

A school creates a histogram representing the individual travel times for students riding the bus to school. The histogram is right-skewed, and the mean time is 25 minutes.

Revolt · Accepted Answer

The median time is less than 25 minutes.

Question 2

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.

Revolt · Accepted Answer

1.5

Question 3

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.

Revolt · Accepted Answer

6

Question 4

The graph represents the distribution of the lengths of play times, in minutes, for songs played by a radio station over one hour.

Revolt · Accepted Answer

Most of the songs were between 3 minutes and 3.8 minutes long.

Question 5

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?

Revolt · Accepted Answer

A graph shows the horizontal axis numbered 15 to 48. The vertical axis is numbered 1 to 5. The graph shows an upward trend from 1 to 30 then a downward trend from 30 to 45.

Question 6

The histogram shows a city’s daily high temperatures recorded for four weeks.

Revolt · Accepted Answer

left-skewed

Question 7

Sixteen students each measured the weight of 25 pennies, in grams. The list shows their measurements.60, 62, 65, 59, 63, 63, 63, 62, 64, 62, 60, 61, 66, 64, 61, 65In each graph below, the mean is indicated by a solid vertical line segment while the standard deviations from the mean are indicated by dotted vertical line segments. Which graph represents the distribution of weights?

Revolt · Accepted Answer

A graph shows the horizontal axis numbered 57 to x. The vertical axis is unnumbered. The graph shows an upward trend from 57 to 62.5 then a downward trend from 62.5 to 68.

Question 8

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

Revolt · Accepted Answer

A histogram will show that the mean time is approximately equal to the median time of 7.5 minutes.; The shape of the histogram can be approximated with a normal curve.; The histogram will show that most of the data is centered between 6 minutes and 9 minutes.

Question 9

The graph shows a distribution of data.

Revolt · Accepted Answer

0.0625

Question 10

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

Revolt · Accepted Answer

100

Line of Best Fit Answers

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