Quizzol

QUESTION:

A local ice cream shop kept track of the number of cans of cold soda it sold each day, and the temperature that day, for two months during the summer. The data are displayed in the scatterplot below:

The X-axis is temperature measured in degrees Fahrenheit with a range from about 55 to 100 degrees. The Y-axis is the number of cans of soda sold with a range from about 165 to 195 cans. The points begin in the lower left, end in the upper right, and follow a fairly linear pattern. One point is away from the others in the lower right portion of the graph.

The one outlier corresponds to a day on which the refrigerator for the soda was broken. Which of the following is true?

A reasonable value of the correlation coefficient r for these data is 1.2.

If the temperature were measured in degrees Celsius (C = 5/9 * (F - 32)), the value of r would change accordingly.

If the outlier were removed, r would get closer to 1.

If the outlier were removed, r would get closer to 0.

If the outlier were removed, r would get closer to -1.

ANSWER:

If the outlier were removed, r would get closer to 1.

Posted by Cleveland on September 19, 2024