MEDAL AND FAN! I KNOW ITS NOT C OR D FOR THE LAST QUESTION SO PLEASE HELLLLLPPPPPPPPP!!!!!!!

- anonymous

MEDAL AND FAN! I KNOW ITS NOT C OR D FOR THE LAST QUESTION SO PLEASE HELLLLLPPPPPPPPP!!!!!!!

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- chestercat

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- anonymous

The box plots below show attendance at a local movie theater and high school basketball games:
Which of the following best describes how to measure the spread of the data?
A. The IQR is a better measure of spread for movies than it is for basketball games.
B. The standard deviation is a better measure of spread for movies than it is for basketball games.
C. The IQR is the best measurement of spread for games and movies.
D. The standard deviation is the best measurement of spread for games and movies

- anonymous

##### 1 Attachment

- anonymous

Someone please help

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## More answers

- amistre64

how do you know its not c or d?

- anonymous

@amistre64 are you able to help me?

- anonymous

Cuz i got them both wrong

- amistre64

so trial and error eh

- amistre64

what do you know about standard deviation and IQR?

- anonymous

wait one second i just notice the choices are all mixed up

- anonymous

Oh i just notice i posted the wrong question..i still need help with this one but theres a another question that i know for sure is not C or D

- anonymous

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 stu 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.)
A. Both spreads are best described with the IQR.
B. Both spreads are best described with the standard deviation.
C. The college spread is best described by the IQR. The high school spread is best described by the standard deviation.
D. The college spread is best described by the standard deviation. The high school spread is best described by the IQR.

- anonymous

Ok so this is the question that the answer is not C or D

- anonymous

Sorry for all the confusion lol

- amistre64

"The standard deviation is used in conjunction with the mean to summarise continuous data, not categorical data. In addition, the standard deviation, like the mean, is normally only appropriate when the continuous data is not significantly skewed or has outliers."
https://statistics.laerd.com/statistical-guides/measures-of-spread-standard-deviation.php

- anonymous

So maybe A

- amistre64

it appears that if the data is pretty consistent (the box plot is symmetric) then the deviation is suitable, otherwise use the IQR.
this is just a cursory reading of the information from the google and i claim no expertise in the matter.

- anonymous

Cuz they both do have outliers.. wait are we doing the first or second question

- amistre64

thats just information, its relevant to the first, might be to the second ... havent read it yet

- anonymous

oh ok well i think it might be A for the first

- amistre64

which one do you say is NOT c or d?

- anonymous

the second question

- amistre64

yeah, movies seems out of whack, so IQR might be better for it, and games is pretty even thruout so deviation for it. as an educated guess.

- anonymous

So A?

- amistre64

organize the table better on 2
sort it so that we can better see the data

- amistre64

A on question 1 seems fair. and like i said, i dont have the expertise to verify its accuracy tho. just information from the google

- anonymous

ok one sec..

- anonymous

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

- anonymous

Ok should be a lot better

- amistre64

Q0 Q1 Q2(Mean) Q3 Q4 IQR σ
College stu 5 7.5 11(13.8) 15 50 7.5 6.4
High School 0 9.5 13(10.7) 14.5 16 5 5.3

- amistre64

both seem a bit off

- anonymous

You forgot to add high and low thats why

- amistre64

Q0 and Q4 are high and low, Q2 is median

- anonymous

i have an idea wait one second

- anonymous

##### 1 Attachment

- anonymous

i just put B for now btw

- anonymous

@amistre64 please dont leave i really need help

- anonymous

Can someone please help me?

- amistre64

im not gone ...

- anonymous

oh ok you werent viewing it tho

- anonymous

Did you see the file i attached?

- amistre64

the little notifs work so when you post i see it and come back. instead of waiting around for who knows how long.
you choose B, why?

- amistre64

assuming B means second that is, none of them are labeled

- anonymous

yea idk why i put it... A dosent seem right

- amistre64

when does IQR work best?
when does deviation work best?

- anonymous

well according to what you told me.. deviation is best when there are outliers

- amistre64

deviation when there are NO outliers .. or rather a nice symmetric plot
^^^

- amistre64

|dw:1433014800492:dw|

- anonymous

ohhhh so A?

- amistre64

I would pick A i this case, but just as an educated guess. again, i am no expert in this.
just going by what i read.

- anonymous

ok hopefully i get it right

- amistre64

with any luck :)

- anonymous

Can you help me with 2 more?

- amistre64

no, ive got other things i need to attend to at the moment

- anonymous

:( do you know anyone who could

- amistre64

theres plenty but i dont know if they are around, post a new question and see who bites.

- anonymous

ok thanks anyways heres your medal and fan.. I will essage you if the answers are correct

- amistre64

good luck ;)

- amistre64

message if they are wrong too, id like to know either way.

- anonymous

Thank you bye

- anonymous

ok

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