Question

Using an appropriate statistical test, conduct, analyze and interpret results. Does the presence of health insurance impact obesity rates?     

                                                                  Total             under     norm          over          obese

18–44	112,149	2,706	43,203	34,044	29,066
45–64	82,605	784	22,052	29,266	26,930

Private	129,666	2,046	45,107	42,921	35,348
Medicaid	23,239	618	6,952	6,384	8,303
Other	9,095	164	2,296	3,207	3,244
Uninsured	31,587	615	10,303	10,594	8,889

Answer 1

Observed frequencies:

	Total	Under	Norm	Over	Obese	Marginal totals
18–44	112,149=O11	2,706=O12	43,203=O13	34,044=O14	29,066=O15	221,168=O10
45–64	82,605=O21	784=O22	22,052=O23	29,266=O24	26,930=O25	161,637=O20
Private	129,666=O31	2,046=O32	45,107=O33	42,921=O34	35,348=O35	255,088=O30
Medicaid	23,239=O41	618=O42	6,952=O43	6,384=O44	8,303=O45	45,496=O40
Other	9,095=O51	164=O52	2,296=O53	3,207=O54	3,244=O55	18,006=O50
Uninsured	31,587=O61	615=O62	10,303=O63	10,594=O64	8,889=O65	61,988=O60
Marginal totals	388,341=O01	6,933=O02	129,913=O03	126,416=O04	111,780=O05	763,383=N

Expected frequencies:

	Total	Under	Norm	Over	Obese
18–44	112510.5	2008.635	37638.51	36625.36	32385
45–64	82226.45	1467.978	27507.49	26767.04	23668.05
Private	129766	2316.694	43411.04	42242.5	37351.81
Medicaid	23144.3	413.192	7742.538	7534.124	6661.85
Other	9159.843	163.5294	3064.272	2981.788	2636.567
Uninsured	31533.95	562.9714	10549.16	10265.19	9076.726

	Total	Under	Norm	Over	Obese
18–44	1.1615	242.1137	822.6562	181.934	340.1503
45–64	1.7427	318.6871	1081.972	233.302	449.5658
Private	0.077	31.6293	66.2572	10.8982	107.4982
Medicaid	0.3875	101.5177	80.7165	175.5726	404.2982
Other	0.459	0.0014	192.6208	17.01	139.945
Uninsured	0.0892	4.8084	5.7439	10.532	3.8826

Since P-value<0.05, there is sufficient evidence to conclude that  the presence of health insurance has impact on obesity rates.