Question

1. Identify the sampling method. You want to find how many students use public transportation. You interview every fifth teenager you see exiting a movie theater.

A. random

B. systematic <<

C. stratified

D. none of these
right?

Answer 1

good

Answer 2

systematic is a basic pattern or rule

Answer 3

thanks! :)

Answer 4

The two box-and-whisker plots below show the times in seconds for two teams in a 100 m dash. What do the interquartile ranges tell you about the two teams?

A. Team A has more consistent times

B. Team B has more consistent times <<

C. Overall team A is faster than team B

D. Overall team B is faster than team A


https://study.ashworthcollege.edu/access/content/group/38441f94-71d6-46e6-8dd7-ece73f5a6548/algebra1_exam_12_files/mc009-1.jpg

Answer 5

https://study.ashworthcollege.edu/access/content/group/38441f94-71d6-46e6-8dd7-ece73f5a6548/algebra1_exam_12_files/mc009-2.jpg

Answer 6

team B is not as spread out as team A, so that would suggest there is not as much deviation (and it would mean team B is more consistent)

so I agree

Answer 7

3. The back-to-back stem-and-leaf plot below show exam scores from two different math classes. Which class has a greater mean score? Which class has a greater median score?

Class A Class B
1 5 4 2
1 6 8 5 4
5 7 7 9 6 1 6
6 6 7 8 9 7 2 5 6 6
1 2 8 0 0 4 8 9
1 9 3 5 6 7


A. greater mean = class A greater median = class A

B. greater mean = class B greater median = class B

C. greater mean = class B greater median = class A

D. greater mean = class A greater median = class B

is it B? cuz i got C wrong?

Answer 8

what did you get for the mean of class A

Answer 9

class a = 1, 5, 1, 6, 8, 5, 7, 7, 9,6,6,7,8,9,1,2,1
class b = 2,4,1,6,2,5,6,60,0,4,8,9,3,5,6,7
the ones in the middle =4,5,6,7,8,9

Answer 10

class a=5.23

Answer 11

I'm getting 68.176 for the mean of class A

Answer 12

I'm getting these values for class A

41,45,51,56,58,65,67,67,69,76,76,77,78,79,81,82,91

Answer 13

you average this list: 41,45,51,56,58,65,67,67,69,76,76,77,78,79,81,82,91


NOT this list 1, 5, 1, 6, 8, 5, 7, 7, 9,6,6,7,8,9,1,2,1


to get the mean for class A

Answer 14

Mean = (Sum of the values)/(Number of values)


Mean = (41+45+51+56+58+65+67+67+69+76+76+77+78+79+81+82+91)/17


Mean = 1159/17


Mean = 68.176

Answer 15

ooooh, now i get it...

Answer 16

do the same for class B and compare the two means

Answer 17

after you find the means, you'll need to compare the medians as well

Answer 18

so, class b= 42,54,61,66,72,75,76,76,80,80,84,88,89,93,95,96,97/17

mean= 77.88

Answer 19

good, you got the correct mean

Answer 20

so class B has the greater mean

Answer 21

now compare the medians

Answer 22

oh I guess since you know it's not C, then it has to be B since that's the only one left where class B has the greater mean

Answer 23

class a =69
class b= 80?

Answer 24

one sec and let me confirm

Answer 25

sure!

Answer 26

good on both, so we can see that class B also has the greater median

Answer 27

Thank youuu for the helpp!!! alright, last question. sorry.

The two box-and-whisker plots below show the scores on a math exam for two classes. What do the interquartile ranges tell you about the two classes?




A. Class A has more consistent scores

B. Class B has more consistent scores

C. Overall class A performed better than class B

D. Overall class B performed better than class A

https://study.ashworthcollege.edu/access/content/group/38441f94-71d6-46e6-8dd7-ece73f5a6548/algebra1_exam_12_files/mc010-1.jpg


https://study.ashworthcollege.edu/access/content/group/38441f94-71d6-46e6-8dd7-ece73f5a6548/algebra1_exam_12_files/mc010-2.jpg

Answer 28

i say C am i right?/ :)

Answer 29

hmm not 100% sure, but I'd say either C (since A does have a lot of scores higher than B) or B (since B has a smaller IQR)

Answer 30

Thank youu!

Answer 31

you're welcome