Waitresses and waiters at a restaurant are trying to estimate the average tip on a given day.
Data is available below or at StatKey.
At Statkey, select CI for Single Mean, Median, St.Dev., then change the data set to Resturant Tips (Tip).
To use a spreadsheet copy and paste the table below.

Apply the Central Limit Theorem to find a 99% confidence interval for the average daily tip at this resturant.

10	7	5.01	3.61	3
2.5	3.44	2.42	3	2
1.75	2.1	1	1.25	1.12
3	2.6	5.91	1.25	7.06
10	5	2	10.41	6.14
3.55	4.47	3.11	4.5	4
6.3	2	2	2.47	3
5	5	2.75	1.42	5
3.7	2.31	10	1.44	1.5
8.06	3.74	4	1.83	1.8
4	3.13	3.61	1.03	4.69
1	1	4	5.7	10.49
15	5.02	3.73	4.05	6
1	4.53	6.96	9	4
6.7	3.15	3.46	3.62	2
1.26	3	5.42	4.05	2.3
5.11	4	3	5.96	4
7	3.75	7.04	4	3
2.2	5.2	2.27	9.76	1.9
5.16	3	2.79	2	3.35
10	5	7.25	0.25	1
2	2.8	2.75	6.05	4
4	4.16	4.71	8	1.82
2	3.33	5.44	4	4.37
1.5	3.18	2.38	0.74	4
2.75	1.56	2.28	1.6	2
1.5	2	5	2	3
3.5	3.72	1	2.43	1.14
4.02	2.75	2.2	0.25	5
5	2.16	2.15	4.15	3
4.4	2.81	5.7	2	3.13
10	2.5