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Appendix U. Unit test

NAME ________________________
SET __________________________

UNIT TEST ON PROBABILITY AND CORRELATION

I. On the following 4 graphs draw the best fit line (1 point each):

II. In this section, indicate whether there is a positive, a negative or no correlation. For those graphs that do show a correlation, indicate the strength: either weak, moderate, or strong. (2 points each).

III. The following graph shows the relationship between the length of babies and the size of their head. Answer the following questions.


1. As the body length increases, what happens to the circumference of the head? (1 point)

 

 

2. Suppose the slope of this graph came out to 1.5cm. Describe what that means according to the data. (3 points)

 

 

3. What kind of correlation does this graph show-positive or negative? What is the strength: moderate, strong or weak? (2points)

 

 

IV. Find the SLOPE and Y-INTERCEPT on the following 4 graphs. YOU MUST SHOW YOUR WORK IN ORDER TO GET FULL CREDIT!!!! (3 points each).


1. Slope: _____________
y-intercept: _________ 		  

2. Slope: ___________
y-intercept: ___________
 		  

3. Slope: ____________
y-intercept: __________
 		  

4. Slope: ______________
y-intercept:__________		  

V. Probability

1. Larry decides to listen to 98PXY for 6 hours. He keeps record of how many times a certain song is played within that time duration. Larry found out that 98PXY plays the same song 2-3 times per hour. Is this an experimental or theoretical probability? (1 point). _____________________________

2. Suppose you were to spin the SPINNER below and then roll a 6-SIDED DIE.

A. What are all the possible outcomes? (2 points)

B. What is the probability that you will get a 1 on BOTH THE DIE AND THE SPINNER? (2 points)

C. What is the probability that you will NOT get a 1 on NEITHER THE DIE NOR THE SPINNER? In other words, what is the probability of never getting a 1? (2 points)

D. What is the probability of getting the SAME NUMBER on the spinner and the die? (2 points).

E. In the above questions, did you find a theoretical or an experimental probability? (1 point)

YOUR ANSWER IS:

Is what you have just figured out a theoretical or experimental probability?( 1 point). __________________

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