Question

Person number	X Value	Y Value	Person number	X Value	Y Value	Person number	X Value	Y Value
1	24	30	11	39	42	21	21	27
2	42	53	12	60	65	22	33	29
3	20	27	13	34	40	23	25	27
4	31	30	14	24	26	24	22	25
5	22	24	15	51	57	25	28	33
6	46	47	16	80	83	26	34	40
7	52	60	17	28	27	27	53	55
8	25	28	18	25	29	28	26	28
9	30	30	19	30	31	29	29	33
10	23	27	20	43	44	30	26	29

Work for the first variable, X:

2. Construct a frequency table, containing at least 5 classes, but no more than 8 classes. [2]

Class	Frequency

3. Make the following graphs, using Stat Crunch.

1. histogram [2]

2. frequency polygon [2]

3. cumulative frequency polygon [2]

4. stem and leaf [2]

5. box plot [2]

4. Obtain the descriptive statistics. [1]

Answer 1

1. Frequency Table for variable X

min value = 20, max. value = 80

CLASS FREQUENCY

20 - 30 17

30 - 40 5

40 - 50 3

50 - 60 4

60 - 70 0

70 - 80 1

1. Histogram

2. The black line over histogram is the frequency polygon.

3. The ogive is

4. Stem and Leaf Display

The decimal point is 1 digit(s) to the right of the |

2 | 012234455566889

3 | 0013449

4 | 236

5 | 123

6 | 0

7 |

8 | 0

5. Boxplot

6. Descriptive statistics

Min. 1st Qu. Median    Mean 3rd Qu.    Max.

20.00   25.00   29.50   34.20   41.25   80.00