Question

The scatterplot shows the time that some students spent studying and the number of spelling mistakes on an essay test.

A graph titled Student mistakes has Studying Time (hours) on the x-axis and number of spelling mistakes on the y-axis. Points are grouped together and decrease. Point (8, 17) is above the cluster.

Which statement about the scatterplot is true?
The point (8, 17) can cause the description of the data set to be overstated.
Although (8, 17) is an extreme value, it should be part of the description of the relationship between studying time and the number of spelling mistakes.
Including the point (8, 17) can cause the description of the data set to be understated.
The point (8, 17) shows that there is no relationship between the studying time and the number of spelling mistakes.

Answer 1

thoughts? notice how the general trend of the graph shows that more hours studied ---> correlates with fewer spelling mistakes

however, 17 mistakes at 8 hours shows a much higher value than expected.

if we average this value with the others, would the result be overstated, or understated, compared to if we removed it?

Answer 2

It's not 2

Answer 3

right, any ideas about the other choices?

Answer 4

and 4

Answer 5

right so that narrows us down to 1+3

going off what I said, does including an overly large value cause the mistakes per hour to be overstated or understated?

Answer 6

and the answer is 1

Answer 7

good, because 17 mistakes is a much higher value than expected for 8 hours, including this value would cause the data set description to be overstated

Answer 8

thx