Question

The table below shows data from a survey about the amount of time students spend doing homework each week. The students were either in college or in high school:

High Low Q1 Q3 IQR Median Mean σ
College 50 5 7.5 15 7.5 11 13.8 6.4
High School 16 0 9.5 14.5 5 13 10.7 5.3

Which of the choices below best describes how to measure the spread of this data?
(Hint: Use the minimum and maximum values to check for outliers.)
Both spreads are best described with the IQR.
Both spreads are best described with the standard deviation.
The college spread is best described by the IQR.

Answer 1

The college spread is best described by the standard deviation. The high school spread is best described by the IQR.

Answer 2

@Qwertty123

Answer 3

just do like we did before ok

Answer 4

I think you copied answer c incorrectly, as it means exactly the same as answer a. WHEN AVAILABLE, the standard deviation is the preferred measure of variation in a data set. The problem is that you don't know what it is and from your given data you have no way to figure it out. So in one sense the answer is b, except that the standard deviation is useless, because you don't know what it is, so the IQR is better than nothing.

Answer 5

Hmm, you'd have to actually plot it and see. the points that are not on or at least close to the line of best fit are the outliers.

Answer 6

The college spread is best described by the IQR. The high school spread is best described by the standard deviation.

Answer 7

that is c

Answer 8

YES!!!! I do agree!

Answer 9

ok thank you

Answer 10

You Welcome!