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Mathematics 8 Online
OpenStudy (anonymous):

SOMEBODY PLEASE HELP!!! The box plots show the average daily temperatures in July and August for a U.S. city: What can you tell about the means for these two months? The August high is above the July median. This makes it hard to know about the means. Both months have the same low temperature. This makes it hard to know about the means. It is unlikely, but possible that the July mean could be higher. There is no way to tell what the means are.

OpenStudy (anonymous):

its question 3 @campbell_st

undeadknight26 (undeadknight26):

Im to tired to answer this mate im sorry ;-;

OpenStudy (anonymous):

Okay

OpenStudy (tkhunny):

What do you think? Don't look at the answers. Make three different conclusions and THEN look at them.

OpenStudy (anonymous):

there is no way to tell what the means are? @tkhunny

OpenStudy (tkhunny):

Is that the nature of Box and Whisker? Do they say anything about the mean? Why do we bother to define the IQR? Do we care if the Mean is in there, somewhere? Okay, that's one conclusion. Two more.

OpenStudy (anonymous):

the first and second possibly but i doubt it @tkhunny

OpenStudy (tkhunny):

What do you mean "the first and second possibly"? That sounds like you are looking at the answers.

OpenStudy (anonymous):

oh sorry i thought i could look at the answers

OpenStudy (tkhunny):

You can look at the answers, but you will learn less. Make up your mind first. Prove that you know what you are looking at. Make sure you can interpret the data.

OpenStudy (tkhunny):

A box and whisker plot does NOT necessarily show the minimum and maximum values. There is a facility for removing "outliers". Careful with that.

OpenStudy (anonymous):

i believe there is no way to find out the means

OpenStudy (anonymous):

@tkhunny

OpenStudy (tkhunny):

Box and Whisker is all about Medians. The Mean is in there, somewhere, but the Box and Whisker presentation doesn't care about it. There may be a way to find out about the Mean, but reference to Box and Whisker is not it.

OpenStudy (anonymous):

so am i correct? :)

OpenStudy (tkhunny):

The August High is above the July Median, but what does this have to do with the Mean? Nothing. I would not mark the first.

OpenStudy (anonymous):

yes and the second one isnt true right?

OpenStudy (tkhunny):

I already addressed the second. It fails to address outliers. Plus, it still has nothing to do with the Means. The third one isn't even a sentence. Don't mark that one. Higher than what?

OpenStudy (tkhunny):

If I had to pick one, it would be the fourth.

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