Data analysis

How many students have more than 1,000 songs on their MP3 player?

• 5
• 16
• 10
• 4

Which box and whisker plot has the highest median?

• Top plot
• Bottom plot

Which type of graph best compares groups of discrete data?

• line graph
• bar graph
• climatogram
• pie graph

Which type of graph best displays change over continuous variables such as temperature, time, and pH?

• line graph
• bar graph
• climatogram
• pie graph

Which type of graph best displays percentages (parts) of a whole?

• line graph
• bar graph
• climatogram
• pie graph

A baseball coach graphs some data and finds the line of best fit. The equation for the line is y = 0.32x - 20.51, where x is the number of times at bat and y is the number of hits. How many hits should he expect from a player who is at bat 175 times?

• 35

• 49

• 609

• 62

A scatter plot has been created. Joe uses the points (2, 8) and (5, 1.5) to create his line of best fit. Which equation would best represent this line?

• y = -2.17x + 12.3

• y = 2.17x + 3.77

• y = -0.46x + 9

• y = -2.17x - 9.35

Sam collected data on the ages and heights of a random sample of elementary school students. If he plots the data on a scatter plot, what relationship will he most likely see between age and height?

• a negative correlation

• no correlation

• a positive correlation

• a constant correlation

The graph shows the relationship between the distance in miles a delivery truck traveled and the number of hours each delivery took. Which of the two given points would be the best to use to calculate the line of best fit?

• (500, 11) and (700, 11)

• (300, 9) and (400, 7)

• (400, 9) and (500, 11)

• (300, 7) and (600, 10)

A high school principal wants to predict the number of students who will drop out of school so he can get funding for support services. He determined the equation that represents this data as = -10x + 216 where x represents the years since 2004, and y is the number of students who drop out. Use this equation to help him predict the number of students who will drop out in 2012.

• -20,2996 students

• 21 students

• 136 students

• 156 students