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

Low Income	High Income
22	17
23	13
24	16
32	27
20	15
20	14
31	25
33	22
15	24
19	22
23	20
31	17
18	10
18	19
24	20
24
20
30
18
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: