Question

Page > of 3 ZOOM + Insuru Kend descriptions les below and answer the lowing questions. A researcher invited a sample of college students to a lab at 1:00 P.M. to take an attentional control test called the Stroop, in which the names of colors are presented in different color text. After finishing the Stroop test, each student wrote down what foods he had consumed in the previous hour, and the researcher figured out how many calories each student had eaten. The table below depicts the seconds each participant took to complete the Stroop test and the number of calories he consumed in the previous hour. Stroop Test Score (Seconds Person to complete) Lunch Calories А 100 550 B 120 200 С 150 210 D 80 600 E 85 750 F 90 400 G 60 575 H 1 120 110 325 350 1. Make a scatterplot of the data in the table below ( point, you may use Microsoft Excel for this). 2. What kind of association is this positive, negative, or zero? (1 point) 3. Does the association seem strong or weak? (1 point) 4. Do you notice any outliers? (1 point) 1 of 1 > DOO esc F1 80 F3 F2 F5 6 # 3. $ 4 % 5 2 & 7

Answer 1

Question 1:

1) Scatterplot of the given data:

lunch calories 800 700 600 500 400 lunch calories 300 200 100 0 O 20 40 60 80 100 120 140 160

Stroop test score in X- axis and lunch calories in Y- axis.

2)There are three types of association in scatter plots:

Positive: as one variable increases the other variable also increases in value.

Negative: as one variable increases the other variable decreases in value.

Zero: there is no apparent pattern followed between the two variables.

In the above, there is no apparent relationship seen between the Stroop test score and the lunch calories, hence, it is a zero association.

3) As the dots in the plot are widely spread and not concentrated along a straight line, the association between the two variables is weak here.

4) Outliers are points which are farthest from the regression line; here, the point corresponding to person C may be taken as the outlier.