help please!

- anonymous

help please!

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- anonymous

@Vocaloid

- anonymous

##### 1 Attachment

- Vocaloid

which group do you think has the higher mean??

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## More answers

- anonymous

B so D?

- Vocaloid

uh, not quite, see how group B has more dots on the left side?

- anonymous

yes

- Vocaloid

that means that group B is going to have a smaller mean, so our answer is..?

- anonymous

C?

- Vocaloid

right

- anonymous

The following table shows the data collected from a random sample of 100 middle school students on the number of hours they do household chores every week:
Weekly Duration of Household Chores
Time (in hours) 0–1 2–3 4–5 6–7
Number of Students 32 64 3 1
There are 1,500 students in the school. Based on the sample proportion, how many students in the school would be expected to do household chores for at least two hours every week?
480
960
1,020
1,440

- Vocaloid

take a look at the table, how many students do at least 2 hours of chores per week?

- anonymous

64

- Vocaloid

not quite, think carefully...
"at least 2" means anything more than 2

- anonymous

right and it says 2-3 hours is 64

- Vocaloid

there's more than that, though... look at the table again carefully...

- anonymous

4-5 amd 6-7

- Vocaloid

right, so we add them all up, giving us...?

- anonymous

21

- Vocaloid

that's not what I meant, I meant to add the number of students...

- anonymous

68

- Vocaloid

there we go!
now, we have (68 students/100) for our sample, let's multiply this by 1500 students to get our answer
(68/100)*(1500) = ?

- anonymous

1020

- Vocaloid

right

- anonymous

The following table shows the data collected from four random samples of 50 students from a small middle school regarding the type of television shows they prefer to watch:
Television Show Preferences
Sample # News Music Movies Cartoons Total
1 2 12 6 30 50
2 3 10 5 32 50
3 5 13 7 25 50
4 6 19 8 17 50
Based on the results in the table, which type of television show is preferred by the majority of students in the samples?
News
Music
Movies
Cartoons

- Vocaloid

what do you think the answer is?

- anonymous

D?

- Vocaloid

right

- anonymous

The price of some jewelry sets in a store are shown below:
Store Price
A $110,000
B $100,000
C $1,110,000
D $130,000
E $120,000
Based on the data, should the mean or the median be used to make an inference about the price of the jewelry sets in the store?
Mean, because it is in the center of the data
Median, because it is in the center of the data
Median, because there is an outlier that affects the mean
Mean, because there are no outliers that affect the mean

- Vocaloid

hint: is there an outlier?

- anonymous

B?

- Vocaloid

pay attention to my hint:
is there an outlier?

- anonymous

no

- Vocaloid

are you sure?
there is one data point that is much larger than the others

- anonymous

oh wait.. there is an outlier

- Vocaloid

right, so our answer is...?

- anonymous

C?

- Vocaloid

good

- anonymous

Four students did a survey to find the ice cream flavor sixth-grade students prefer. The table below shows the method each student used to conduct the survey:
Student Method
Jane Asked 100 sixth-grade students at random what their favorite ice cream flavor is
Ken Asked 100 students at random from his seventh-grade class what their favorite ice cream flavor is
Sasha Asked 100 eighth-grade students at random what their favorite ice cream flavor is
Kevin Asked 100 third-grade students at random what their favorite ice cream flavor is
Which student's survey is most likely not biased?
Jane
Ken
Sasha
Kevin

- Vocaloid

hint: the goal is to find data for 6th graders, so our answer is...?

- anonymous

A?

- Vocaloid

yup

- anonymous

Sue wants to know how many families in her small neighborhood of 50 homes would volunteer to help at a neighborhood animal shelter. She put all the addresses in a bag and drew a random sample of 25 addresses. She then asked those families if they would volunteer to help at the shelter. She found that 18% of the families would volunteer to help at the shelter. She claims that 18% of the neighborhood families would be expected to help at the animal shelter. Is this a valid inference?
Yes, this is a valid inference because the 25 families speak for the whole neighborhood
Yes, this is a valid inference because she took a random sample of the neighborhood
No, this is not a valid inference because she only asked 25 families
No, this is not a valid inference because she did not take a random sample of the neighborhood

- Vocaloid

this is a random sample, so...?

- anonymous

b?

- Vocaloid

yes

- anonymous

##### 1 Attachment

- Vocaloid

whichever one has the greater MAD has the greater variability

- anonymous

A?

- Vocaloid

read the problem carefully...

- anonymous

b?

- Vocaloid

good

- Vocaloid

I really need sleep, how many more are there?

- anonymous

5 quick ones :) and thats it .. i promise

- Vocaloid

sure

- anonymous

The following table shows the data collected from 2 random samples of 100 students each from an after-school club regarding their favorite outdoor activity:
Sample Canoeing Bike Racing Reading Total
1 40 35 25 100
2 45 40 15 100
Which of the following observations can be made about the number of students in the club who prefer canoeing?
It is more than the number of students who prefer bike racing and reading combined.
It is less than the number of students who prefer bike racing and reading combined.
It is equal to the number of students who prefer reading.
It is less than the number of students who prefer bike racing.

- Vocaloid

what do you think the answer is? just go through each choice and see which one is true

- anonymous

d?

- Vocaloid

are you sure? is the number for canoing less than the number for bike racing?

- anonymous

no

- Vocaloid

so d is not the answer, keep trying

- anonymous

b

- Vocaloid

right

- anonymous

Noah wants to predict who will be selected as the sixth-grade treasurer for student council. Which of the following groups should Noah survey to make his prediction?
The first 100 students from an alphabetical list of the entire school
The first 100 students from an alphabetical list of sixth graders
One hundred random students from the entire school
One hundred random students from the sixth grade

- Vocaloid

well, like always, we want a random sample, and we want 6th graders, so our answer is...?

- anonymous

D?

- Vocaloid

yes

- anonymous

##### 1 Attachment

- Vocaloid

what do you think? which one has the higher mean?

- anonymous

b?

- Vocaloid

no, look at the graphs carefully... which one has more dots on the right side?

- anonymous

grade 6 so A?

- Vocaloid

yes

- anonymous

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- Vocaloid

like we've said before...
higher mean absolute deviation means higher variability...

- anonymous

b or d right?

- Vocaloid

choose one...

- anonymous

d

- Vocaloid

right

- anonymous

last one!

##### 1 Attachment

- Vocaloid

well, which one has the greater mean?

- anonymous

A?

- Vocaloid

yes, so our answer is A

- anonymous

ok thank you for everything :)

- Vocaloid

no problem, don't forget to medal. good night ~

- anonymous

goodnight! oh! can you answer these quick questions please ... really fast.. they are not problems they are just questions ..please :)

- anonymous

What are scale drawing? Give an example.

- anonymous

@Vocaloid

- anonymous

@Vocaloid ??

- anonymous

are you there?

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