help!!

- anonymous

help!!

- Stacey Warren - Expert brainly.com

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- jamiebookeater

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- anonymous

The dot plots below show the test scores of seventh- and eighth-grade students:
src="http://learn.flvs.net/webdav/assessment_images/educator_mjmath2_v14/mjmath2_practice_m8_g7_p.jpg"
Based on visual inspection of the dot plots, which grade, if any, appears to have the higher mean score?
Grade 7
Grade 8
Both groups show about the same mean score.
No conclusion about mean score can be made from the data.

- Phebe

@Nnesha

- Phebe

i cant sorry

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## More answers

- Phebe

i dont even see your dotted line thing
it said error

- Phebe

it say cookie error

- anonymous

@markaskingalexandria1

- anonymous

sorry cant help the page u added on ur question keeps saying error

- anonymous

OMG!!

- anonymous

wait do you have kik i cant take a pic and send it to you??

- anonymous

*can

- anonymous

nope i have hangout

- anonymous

what is that?

- Phebe

i got both
jus cant get on kik tho

- anonymous

ok im downloading it right now

- anonymous

ok whats your username

- anonymous

@markaskingalexandria1

- anonymous

for hangout

- anonymous

yes

- anonymous

The price of some houses in a neighborhood are shown below:
House Price
A $120,000
B $130,000
C $140,000
D $150,000
E $1,110,000
Based on the data, should the mean or the median be used to make an inference about the price of the houses in the neighborhood?
Median, because there is an outlier that affects the mean
Mean, because there are no outliers that affect the mean
Median, because it is in the center of the data
Mean, because it is in the center of the data

- anonymous

Median, because it is in the center of the data

- anonymous

thank you!!

- anonymous

The following table shows the data collected from a random sample of 100 middle school students on the number of hours they play outdoor games every week:
Weekly Duration of Outdoor Games
Time (in hours) 0–2 3–5 6–8 9–11
Number of Students 30 62 8 0
There are 1,200 students in the school. Based on the sample proportion, how many students in the school would be expected to play outdoor games for at least three hours every week?
744
840
960
1,104

- anonymous

idk this one

- anonymous

Jack wants to know how many families in his small neighborhood of 60 homes would help organize a neighborhood fund-raising party. He put all the addresses in a bag and drew a random sample of 30 addresses. He then asked those families if they would help organize the fund-raising party. He found that 12% of the families would help organize the party. He claims that 12% of the neighborhood families would be expected to help organize the party. Is this a valid inference?
No, this is not a valid inference because he asked only 30 families
No, this is not a valid inference because he did not take a random sample of the neighborhood
Yes, this is a valid inference because he took a random sample of the neighborhood
Yes, this is a valid inference because the 30 families speak for the whole neighborhood

- anonymous

??

- anonymous

Yes, this is a valid inference because he took a random sample of the neighborhood

- anonymous

its still not letting me see it

- anonymous

- anonymous

@MTALHAHASSAN2

- anonymous

@MTALHAHASSAN2 ??

- MTALHAHASSAN2

yes

- anonymous

the answer..?

- MTALHAHASSAN2

wait a sec

- MTALHAHASSAN2

let me think

- anonymous

ok

- MTALHAHASSAN2

I will say look at 3-5 hours, and the sample is from 100 students, and we have 62 students who play at least 3 - 5 hours a day. So that's 62%, just multiply 1200 by 62%.

- anonymous

so whats the answer

- MTALHAHASSAN2

i am getting 744 but not sure if is it right or not

- anonymous

ok, i got the same thing

- MTALHAHASSAN2

i will say plz conform from someone else

- MTALHAHASSAN2

by the which grade question is it??

- anonymous

huh?

- MTALHAHASSAN2

@Michele_Laino

- Michele_Laino

the experimental frequency is:
62/100=0.62, so the requested number is:
(62/100)*1200=...?

- anonymous

?

- Michele_Laino

the proportion of student which play outdoor games is:
62/100, namely 62 students over 100 students in total

- anonymous

so whats the answer

- MTALHAHASSAN2

744

- anonymous

ok thanks!! mind helpig me with a few more?

- Michele_Laino

now we have to write that proportion for a sample of 1200 students, so the requested number of students, which play outdorr games, for a sample of 1200 students, is:
\[\Large \frac{{62}}{{100}} \cdot 1200 = ...?\]

- Michele_Laino

outdoor*

- anonymous

- anonymous

@Michele_Laino @MTALHAHASSAN2

- Michele_Laino

I'm sorry I see only an error message

- MTALHAHASSAN2

same

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