Central Limit theorem for means
US Population								means of 36 samples (sample size n is 40)
Class	Class	Relative						28.14					1. Find the mean age in the United States
Boundaries	midpoint	Frequency						31.56					2. Find the mean of the 36 sample means. Is it close to the U.S. mean age?
0-4	2	0.068						36.86					3. Create the histogram for the age of U.S. population
5-9	7	0.066						32.37					4. Create the hsitogram for the 36 sample means. Is the distribution approximately normal?
10-14	12	0.070						36.12					5. Find the age standard deviation of the U.S. population
15-19	17	0.071						39.53					6a. Find the age standard deviation of the 36 samples.
20-24	22	0.071						36.19					6b. Show that the result in 6a agrees with the result predicted by the Central Limit Theorem.
25-29	27	0.068						39.02
30-34	32	0.068						35.62
35-369	37	0.071						36.30
40-44	42	0.077						34.38
45-49	47	0.076						32.98					Q1:	#DIV/0!
50-54	52	0.067						36.41					Q2:	36.21
55-59	57	0.059						30.24
60-64	62	0.044						34.19
65-69	67	0.034						44.72
70-74	72	0.029						38.84
75-79	77	0.025						42.87
80-84	82	0.019						38.90
85-89	87	0.011						34.71
90-94	92	0.005						34.13
95-99	97	0.001						38.25
								38.04
								34.07
								39.74
								40.91
								42.63
								35.29
								35.91
								34.36
								36.51
								36.47
								32.88
								37.33
								31.27
								35.80