The table 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 s.d. 50 5 7.5 15 7.5 11 13.8 6.4

Question

The table 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    s.d.	   50	5	7.5	15	7.5	   11	         13.8	    6.4

anonymous · Answer

oops I'll send the graph again

anonymous · Answer

High	Low	Q1	Q3	IQR	Median	Mean	σ
50	5	7.5	15	7.5	  11	       13.8          	6.4

anonymous · Answer

that was college

anonymous · Answer

high school: 
High	Low	Q1	Q3	IQR	Median	Mean	σ

16	0	9.5	14.5   5	   13	      10.7          	5.3

anonymous · Answer

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.)

anonymous · Answer

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

anonymous · Answer

@Bunny41414<3 @Whitemonsterbunny17

anonymous · Answer

@rational

anonymous · Answer

@phi

anonymous · Answer

@jtvatsim

anonymous · Answer

anyone???

jtvatsim · Answer

sorry statistics isn't my strength... :(

anonymous · Answer

It's okay no one is really good at statistics. It gives me a headache *shudder*

anonymous · Answer

@phi?

phi · Answer

remind what IQR stands for ?

anonymous · Answer

interquartile range

phi · Answer

my first thought is for high school  IQR= 5 and std= 5.3 are very close, so it's not obvious to me if either is much better than the other.

anonymous · Answer

yeah exactly I can't decide

phi · Answer

They are asking about some subtlety (which I don't know).
Did you go over some lesson that explained when IQR is better than std ?

anonymous · Answer

And I know it's not c because I picked that earlier. I know IQR is better with outliers and std isn't

phi · Answer

in that case, the college has an outlier  (mean and median are quite different)

anonymous · Answer

yes...

anonymous · Answer

I still don't know about high school

phi · Answer

if IQR for college and not choice c, that leaves choice a ?

anonymous · Answer

okay I guess that makes sense

anonymous · Answer

Thanks!