scatter plots #2

Which statement is true about the given scatter plot?

• It has positive association because all of the points have positive coordinates
• It has negative association because the practice length is always less than the number of baseballs in the cart.
• It has positive association becouse the points on the graph go towards 50.
• It has negative association because as the practice length increases the number of baseballs decreases.

A scatter plot is a graph that shows

• how small parts of data relate the the whole set
• the total number of outcomes for an event
• the general relationship between 2 sets of data
• statistical values

Choose the graph that has the best trend line drawn

• W
• X
• Y
• Z

• 440 turtles
• 40 turtles
• 150 turtles
• 90 turtles

Mrs. Collins made a scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 6 absences should get approximately what score on the final exam? 

• 65
• 92
• 70
• 76

The relationship of birthdays to candles

• Positive correlation
• Negative correlation
• No correlation
• all of the above

The points in the scatterplot represent paired observations (x, y) where x is an individual’s weight and y is the time (in seconds) it takes for walking on a treadmill to raise the individual’s pulse rate to 140 beats per minute.  The open circles correspond to females and the dark squares to males.

• There is a positive correlation r between gender and weight, since men tend to weigh more than women.
• There is a negative correlation r between weight and time for both males and females.
• In general, males tend to take less time to have their pulse rate raised to 140 bpm while walking on the treadmill.

The following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month.  Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles? 

• A. 50 min
• B. 80 min
• C. 45 min
• D. 60 min

As x increases, y increases

• correlation coefficient
• causation
• positive correlation
• negative correlation

Which of the following could be a possible line of best fit for the data?

• y = -5/2x + 20
• y = -x + 19
• y = x + 20
• y = 2/3x + 15