Question

help!!

Answer 1

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.

Answer 2

@Nnesha

Answer 3

i cant sorry

Answer 4

i dont even see your dotted line thing
it said error

Answer 5

it say cookie error

Answer 6

@markaskingalexandria1

Answer 7

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

Answer 8

OMG!!

Answer 9

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

Answer 10

*can

Answer 11

nope i have hangout

Answer 12

what is that?

Answer 13

i got both
jus cant get on kik tho

Answer 14

ok im downloading it right now

Answer 15

ok whats your username

Answer 16

@markaskingalexandria1

Answer 17

for hangout

Answer 18

yes

Answer 19

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

Answer 20

Median, because it is in the center of the data

Answer 21

thank you!!

Answer 22

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

Answer 23

idk this one

Answer 24

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

Answer 25

??

Answer 26

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

Answer 27

its still not letting me see it

Answer 28

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

Answer 29

@MTALHAHASSAN2

Answer 30

@MTALHAHASSAN2 ??

Answer 31

yes

Answer 32

the answer..?

Answer 33

wait a sec

Answer 34

let me think

Answer 35

ok

Answer 36

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%.

Answer 37

so whats the answer

Answer 38

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

Answer 39

ok, i got the same thing

Answer 40

i will say plz conform from someone else

Answer 41

by the which grade question is it??

Answer 42

huh?

Answer 43

@Michele_Laino

Answer 44

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

Answer 45

?

Answer 46

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

Answer 47

so whats the answer

Answer 48

744

Answer 49

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

Answer 50

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:
\[\Large \frac{{62}}{{100}} \cdot 1200 = ...?\]

Answer 51

outdoor*

Answer 52

<img src=" http://learn.flvs.net/webdav/assessment_images/educator_mjmath2_v14/mjmath2_practice_m8_g8_c2.jpg " alt="
Which of the following inferences can be made using the dot plots?

Group X has a higher mean than group Y.
Group Y has a higher mean than group X.
There is no overlap between the data.
The range of each group is different.

Answer 53

@Michele_Laino @MTALHAHASSAN2

Answer 54

I'm sorry I see only an error message

Answer 55

same