Question

The coin size data (measured in millimeters) collected from each group is shown below.

Low Income	High Income
25	22
20	24
17	19
20	22
26	24
27	20
24	22
20	15
21	16
21	9
24	20
21	22
25	23
20	17
24	19
24
21
24
21
21

You can copy the data into Excel by highlighting the data, right-clicking and selecting Copy, then opening Excel, clicking on a blank cell, and selecting Paste from the Edit menu.

Give your answers to at least 3 decimal places accuracy. Keep the data in Excel, as you will need this information again in later questions.

2. Compute the following summary statistics

a) The mean for the low income group is:

b) The median for the low income group is:

c) The standard deviation for the low income group is:

d) The mean for the high income group is:

e) The median for the high income group is:

f) The standard deviation for the high income group is:

pls very urgent

Answer 1

Ans. Note :- For calculating Median, we arrage Low income group and High Income group in ascending order.

Obs.	Low Income(x)	x2		Obs.	High Income (y)	y2
1	17	289	1	9	81
2	20	400	2	15	225
3	20	400	3	16	256
4	20	400	4	17	289
5	20	400	5	19	361
6	21	441	6	19	361
7	21	441	7	20	400
8	21	441	8	20	400
9	21	441	9	22	484
10	21	441	10	22	484
11	21	441	11	22	484
12	24	576	12	22	484
13	24	576	13	23	529
14	24	576	14	24	576
15	24	576	15	24	576
16	24	576	SUM =	294	5990
17	25	625
18	25	625
19	26	676
20	27	729
SUM =	446	10070