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