Statistics Review

The table shows the estimated number of lines of code written by computer programmers per hour when x people are working.

Which model best represents the data?

• y = 47(1.191)^x

• y = 34(1.204)^x

• y = 26.9x – 1.3

• y = 27x - 4

Tags

CCSS.HSF.LE.A.2

What is the correlation coefficient for the data shown in the table?

• 0

• 1

• 4

• 5

Tags

CCSS.HSS.ID.C.8

The chart represents a data set’s given values, predicted values (using a line of best fit for the data), and residual values. Which is the missing residual value?

• g = 2 and h = –1

• g = 28 and h = 39

• g = –2 and h = 1

• g = –28 and h = –39

Tags

CCSS.HSS.ID.B.6B

Ms. Sutton recorded the word counts and scores of the top ten essays in a timed writing contest. The table shows her data.

• Word count tends to decrease as the score decreases.

• Word count tends to increase as the score decreases.

• Word count tends to remain constant as the score decreases.

• Word count has no apparent relationship to the score of the essay.

Tags

CCSS.HSF-LE.A.1B

A store manager is looking at past jewelry sales to determine what sizes of rings to keep in stock. The list shows the ring sizes purchased by the last ten jewelry customers.

9, 7, 6.5, 7.5, 7, 8, 5, 6, 7.5, 8

What is the variance of the data set? Round to the nearest hundredths.

• 0.40

• 0.72

• 1.15

• 2.14

The stem-and-leaf plot below shows the number of pages each student in a class read the previous evening.

• Its median is greater than its mode

• It has a range of 52 pages

• The value of the first quartile is 13

• The data is symmetric

The histogram represents boiling temperatures, in degrees Celsius, of tap water and of a saltwater mix.

• The mean of the tap water boiling temperatures is about 4° less than the mean of the saltwater boiling temperatures.

• The mean of the tap water boiling temperatures is about 2° less than the mean of the saltwater boiling temperatures.

• The mean of the tap water boiling temperatures is about 1° greater than the mean of the saltwater boiling temperatures.

• The mean of the tap water boiling temperatures is about 3° less than the mean of the saltwater boiling temperatures.

A research study was conducted to measure the time students focused on a task before being distracted. The box plots show the distributions of attention spans of high school and college students.

What measure of center can be determined and compared in the box plots?

• Mean

• Median

• Range

• IQR

Tags

CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2

The dot plot represents the amount of rain recorded by rain gauges in different locations around a city.

How many rain gauges recorded rainfall?

• 2

• 8

• 11

• 16

Tags

CCSS.3.MD.B.4

Jillian and Dawn are playing a game of miniature golf. In this game, the score on a hole is the number of putts it takes to get the ball into the hole. The winner is the player with the lowest score. After playing 18 holes, Jillian’s mean is 2.4 and Dawn’s mean is 3.3. Which explains who won the game?

• Jillian won the game because her score varied less than Dawn’s score.

• Jillian won the game because the person with the lower mean took fewer putts on average for each hole.

• Dawn won the game because the person with the greater mean played better.

• Dawn won the game because her mean absolute deviation was less than Jillian’s.

Tags

CCSS.7.SP.B.4