1. Toss 5 coins simultaneously for 20 times. Record the results with the number of heads occurred.

Trial number Number of heads

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Create a frequency table or probability distribution for the success of the number of heads. Calculate the expected mean, variance, and standard deviation.