Question

The number of books in 11 bookshelves in a library is shown below:

23, 41, 27, 25, 31, 21, 21, 45, 56, 37, 58

Use a histogram to organize the data and answer the following question:

Which statement best compares the height of the bars of the histogram?

Answer 1

It is equal for intervals 50-59 and 20-29.

It is equal for intervals 40-49 and 20-29.

It is greater for interval 20-29 than for interval 30-39.

It is greater for interval 30-39 than for interval 40-49.

Answer 2

can anyone help?

Answer 3

20 - 29 : 5
30 - 39 : 2
40 - 49 : 2
50 - 59 : 2

your answer is C

I didn't draw the histogram out, but I kinda worked it out.

Answer 4

thank you can you help on another?

Answer 5

I labeled the histogram...20 - 29, 30 - 39, 40 - 49, 50 - 59 and the frequency is how many numbers appear in that number range

Answer 6

wow your really good at this even showing work :)

Answer 7

what else ya got ?

Answer 8

The table below shows the age of some participants in a quiz competition, and the number of questions they could answer correctly:

Answer 9

can I see the table

Answer 10

Age (years) (x)

15

21

17

22

16

19

18

Number of questions they could answer (y)

17

17

17

17

17

17

17

Answer 11

What is the correlation coefficient for the data, and what does it represent?



0; it represents no correlation between x and y

1; it represents a linear positive correlation between x and y

-1; it represents a linear negative correlation between x and y

1; it represents a linear negative correlation between x and y

Answer 12

give me just a second...I have to graph this

Answer 13

oki doki :)

Answer 14

ok....when all your points are plotted...(15,17),(21,17) and so on....sonce all the y's are the same, this means that you have a horizontal line. When there is a horizontal line, the slope is 0. Whatever is being measured on the x axis has no bearing on whatever happens on the y axis, because the value of x has no effect on y. So there is no correlation between x and y. Answer is A (or the first one)

Answer 15

Can you help me do the last one?

Answer 16

I can try

Answer 17

oh and thanks a gazzilion times :)

Answer 18

A swimming club has 72 trainers who teach swimming, and 30 of those trainers also teach diving. There are 28 trainers who do not teach swimming but teach diving, and 8 trainers do not teach either swimming or diving. Which table best shows the relative frequency of rows for the data?

Answer 19

Teach swimming

Do not teach swimming

Total

Teach diving

0.28

0.26

1

Do not teach diving

0.39

0.07

1

Total

0.67

0.33

1





Teach swimming

Do not teach swimming

Total

Teach diving

0.42

0.78

1

Do not teach diving

0.58

0.22

1

Total

0.67

0.33

1





Teach swimming

Do not teach swimming

Total

Teach diving

0.30

0.28

1

Do not teach diving

0.42

0.80

1

Total

0.72

0.36

1





Teach swimming

Do not teach swimming

Total

Teach diving

0.52

0.48

1

Do not teach diving

0.84

0.16

1

Total

0.67

0.33

1

Answer 20

oh wow that was not good

Answer 21

imma just then take a screenshot

Answer 22

I am gonna say the third one.

Answer 23

sorry it took so long

Answer 24

naw its ok, do you have proof

Answer 25

well....the way I figure..
there are 72 trainers + 8 non- trainers...leaving us with 80.

72 who teach swimming and 30 who teach both swimming and diving, that leaves 42 who just teach swimming.
30 teach both.
28 teach just diving

It seems to match....but I am not 100% sure because when I add, they don't quite come out equal.

Answer 26

you might need a second opinion on this one

Answer 27

hmm.... so can you check some of my answers?

Answer 28

I can try

Answer 29

wonderful :)

Answer 30

where are your answers

Answer 31

or do I need to go on your profile and look for questions already asked

Answer 32

The following data shows the scores Gina obtained on 12 IQ tests:

93, 83, 74, 74, 83, 92, 93, 94, 90, 87, 83, 86

The box plot below represents the data:

box plot has minimum value equal to 74, lower quartile equal to 83, median equal to 86.5, upper quartile equal to 92.75 and maximum value equal to 99

Which of the following is shown incorrectly in the box plot?

Median

Lower quartile

Upper quartile

Maximum value

Answer 33

here :)

Answer 34

ignore that didn't come out well

Answer 35

The following data shows the scores Gina obtained on 12 IQ tests:

93, 83, 74, 74, 83, 92, 93, 94, 90, 87, 83, 86

The box plot below represents the data:

-----------------


Which of the following is shown incorrectly in the box plot?

Median

Lower quartile

Upper quartile

Maximum value

Answer 36

74,74,83,83,83,86,87,90,92,93,93,94

median (Q2)= (86 + 87) / 2 = 173/2 = 86.5
lower quartile (Q1) = 83
upper quartile (Q3) = 93
minimum value = 74
maximum value = 94

That would be the maximum value that is incorrect. The box plot shows the maximum value at 99 when all the maximum value is, is the largest number, which is 94.

Answer 37

oh darn thats bad because I had upper quartile :)

Answer 38

it can get a little confusing sometimes. Don't worry...if I had $1 for every mistake I made, I would be rich...but you probably didn't want to hear that from somebody who is helping you with your homework..lol

Answer 39

no no its fine, so C or D?

Answer 40

im goin with you becuase I trust you :)

Answer 41

that would be D....maximum value

Answer 42

ok :) time for the next one

Answer 43

The table below shows the amount of money, in cents, Celine had in her savings account after different number of years:


Years

2

5

1

4

6

3

Money in cents

36

972

12

324

2,916

108



What will be the amount of money, in cents, that Celine will save in 12 years?
34,992

708,588

2,125,764

2,679,875

Answer 44

I need to ask you a favor...can you please close this question. We can still post on it. I just don't want a moderator coming and banning me for giving answers

Answer 45

oh yeah sure

Answer 46

Let me make a chart on this...hold on

Answer 47

I posted a new question :)

Answer 48

I will go to your other question