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Statistics Essay

890 words - 4 pages

Data File 2

Chapter Three (Show all your work)

1) A teacher asked each of her students how many novels they had read in the previous six months. The results are shown below.

0 1 5 4 2 1 3 2
2 7 2 5 0 1 0 1
1 2 6 0 2 3 1 2
7 1 4 2 3 1 7 0
0 2 1 1 0 6 1 7

Construct a frequency table for the number of novels read.

|Number |Frequency |
|of novels | |
|0 |7 |
|1 |11 |
|2 |9 |
|3 |3 |
|4 |2 |
|5 |2 |
|6 |2 ...view middle of the document...

[pic]

5) Examine the stem and leaf plot below. Find the original data from the stem and leaf plot.

Stem Leaves

1 1,8,6
2 1,1,3,7
3 1,3,3,8,9
4 3,4

11, 18, 16, 21, 21, 23, 27, 31, 33, 33, 38, 39, 43, 44

6) Create a stem and leaf plot with the following data.

10, 12, 33, 25, 22, 18, 19, 31, 28, 22, 13, 15, 15, 20, 21, 35, 32

10 12 13 15 15 18 19 20 21 22 22 25 28 31 32 33 35

|Stem |Leaves |
| | |
|1 |0,2,3,5,5,8,9 |
|2 |0,1,2,2,5,8 |
|3 |1,2,3,5 |
| | |

Chapter Four (Show all your work)

1) The students of Hugh Logan’s math class took the Scholastic Aptitude Test. Their math scores are shown below. Find the mean score.

552 593 358 352 537
349 357 596 470 482

x= (552+593+358+352+537+349+357+596+470+482) = 4646 = 464.6
10 10

2) The salaries of ten randomly selected physicians are shown below. Find the median salary.

$105,000 $149,000 $163,000 $214,000 $225,000
$116,000 $111,000 $791,000 $240,000 $178,000

$105,000 $111,000 $116,000 $149,000 $163,000
$178,000 $214,000 $225,000 $240,000 $791,000

The median is $163,000

3) Find the mode(s) for the given sample data.

20, 43, 46, 43, 49, 43, 49

20, 43, 43, 43, 46, 49, 49

The mode is 43.

4) The mathematics SAT scores of the seven students in a mathematics seminar are 533, 553, 578, 586, 619, 626, and...

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