anonymous
  • anonymous
MEDAL AND FAN! I KNOW ITS NOT C OR D FOR THE LAST QUESTION SO PLEASE HELLLLLPPPPPPPPP!!!!!!!
Mathematics
  • Stacey Warren - Expert brainly.com
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jamiebookeater
  • jamiebookeater
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anonymous
  • 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
  • anonymous
1 Attachment
anonymous
  • anonymous
Someone please help

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amistre64
  • amistre64
how do you know its not c or d?
anonymous
  • anonymous
@amistre64 are you able to help me?
anonymous
  • anonymous
Cuz i got them both wrong
amistre64
  • amistre64
so trial and error eh
amistre64
  • amistre64
what do you know about standard deviation and IQR?
anonymous
  • anonymous
wait one second i just notice the choices are all mixed up
anonymous
  • 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
  • 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
  • anonymous
Ok so this is the question that the answer is not C or D
anonymous
  • anonymous
Sorry for all the confusion lol
amistre64
  • 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
  • anonymous
So maybe A
amistre64
  • 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
  • anonymous
Cuz they both do have outliers.. wait are we doing the first or second question
amistre64
  • amistre64
thats just information, its relevant to the first, might be to the second ... havent read it yet
anonymous
  • anonymous
oh ok well i think it might be A for the first
amistre64
  • amistre64
which one do you say is NOT c or d?
anonymous
  • anonymous
the second question
amistre64
  • 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
  • anonymous
So A?
amistre64
  • amistre64
organize the table better on 2 sort it so that we can better see the data
amistre64
  • 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
  • anonymous
ok one sec..
anonymous
  • 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
  • anonymous
Ok should be a lot better
amistre64
  • 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
  • amistre64
both seem a bit off
anonymous
  • anonymous
You forgot to add high and low thats why
amistre64
  • amistre64
Q0 and Q4 are high and low, Q2 is median
anonymous
  • anonymous
i have an idea wait one second
anonymous
  • anonymous
anonymous
  • anonymous
i just put B for now btw
anonymous
  • anonymous
@amistre64 please dont leave i really need help
anonymous
  • anonymous
Can someone please help me?
amistre64
  • amistre64
im not gone ...
anonymous
  • anonymous
oh ok you werent viewing it tho
anonymous
  • anonymous
Did you see the file i attached?
amistre64
  • 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
  • amistre64
assuming B means second that is, none of them are labeled
anonymous
  • anonymous
yea idk why i put it... A dosent seem right
amistre64
  • amistre64
when does IQR work best? when does deviation work best?
anonymous
  • anonymous
well according to what you told me.. deviation is best when there are outliers
amistre64
  • amistre64
deviation when there are NO outliers .. or rather a nice symmetric plot ^^^
amistre64
  • amistre64
|dw:1433014800492:dw|
anonymous
  • anonymous
ohhhh so A?
amistre64
  • 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
  • anonymous
ok hopefully i get it right
amistre64
  • amistre64
with any luck :)
anonymous
  • anonymous
Can you help me with 2 more?
amistre64
  • amistre64
no, ive got other things i need to attend to at the moment
anonymous
  • anonymous
:( do you know anyone who could
amistre64
  • amistre64
theres plenty but i dont know if they are around, post a new question and see who bites.
anonymous
  • anonymous
ok thanks anyways heres your medal and fan.. I will essage you if the answers are correct
amistre64
  • amistre64
good luck ;)
amistre64
  • amistre64
message if they are wrong too, id like to know either way.
anonymous
  • anonymous
Thank you bye
anonymous
  • anonymous
ok

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