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Mathematics 21 Online
OpenStudy (anonymous):

@tkhunny do you mind helping me

OpenStudy (anonymous):

The table shows data from a survey about the number of times families travel by car or taxi during an average week. The families are either from a rural town (population under 5,000) or a large city (population over 1 million): Rural Town City 0 2 1 5 2 6 8 7 9 9 15 14 20 15 25 20 35 25 36 25 40 30 Which of the choices below best describes how to measure the center of this data? Both centers are best described with the mean. Both centers are best described with the median. The country data center is best described by the mean. The city data center is best described by the median. The country data center is best described by the median. The city data center is best described by the mean.

OpenStudy (anonymous):

@bibby

OpenStudy (anonymous):

@iGreen

OpenStudy (anonymous):

help me somebody plz

OpenStudy (anonymous):

igreen help

OpenStudy (tkhunny):

Why don't you calculate the means and medians and see how you feel about them?

OpenStudy (anonymous):

okay so how do I do that?

OpenStudy (tkhunny):

You should not have been given this problem without first being given the tools to solve it. Are you saying you do not know the definition of a Median? Are you saying you do not know how to calculate a Mean?

OpenStudy (anonymous):

well sort of.

OpenStudy (tkhunny):

Please recite the definition of a Median. It is brief.

OpenStudy (anonymous):

median is middle i think...

OpenStudy (tkhunny):

Okay, so line them up in order and pick the middle one. What are the two medians?

OpenStudy (anonymous):

14 an dhte other is between 15 and 20

OpenStudy (anonymous):

so I add and divide 15 and 20 right?

OpenStudy (anonymous):

ohh k...then it is 14 and 15

OpenStudy (tkhunny):

Why did you pick "and 20"? It's just 15 for rural and 14 for city. You get only one middle.

OpenStudy (tkhunny):

Sorry, I had that backwards. Okay, now ask yourself, Rural: does 15 seem a reasonable representative for data that go from 0 to 40? City: does 14 seem a reasonable representative for data that go from 2 to 30?

OpenStudy (anonymous):

hmm...looks like D to me

OpenStudy (tkhunny):

Don't get ahead of yourself. Let's calculate the Means. In this context, a "mean" is just an "average". Add them all up and divide by however many there are. These will be the means. Rural: (0 + 1 + 2 + ... + 36 + 40) / 11 = ?? Citry: = ??

OpenStudy (anonymous):

okay so i add them first

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