Question

Contingency table results:

Rows: Usedpot
Columns: Forgot Date

Cell format

Count
(Row percent)
(Column percent)
(Percent of total)

		Marijuana usage
	No	Yes	Total
3+ times % with pot usage % with forgot date % of Total	37 (55.22%) (18.05%) (9.25%)	30 (44.78%) (15.38%) (7.5%)	67 (100%) (16.75%) (16.75%)
Never % with pot usage % with forgot date % of Total	119 (50.85%) (58.05%) (29.75%)	115 (49.15%) (58.97%) (28.75%)	234 (100%) (58.5%) (58.5%)
Once or twice % with pot usage % with forgot date % of Total	49 (49.49%) (23.9%) (12.25%)	50 (50.51%) (25.64%) (12.5%)	99 (100%) (24.75%) (24.75%)
Total % with pot usage % with forgot date % of Total	205 (51.25%) (100%) (51.25%)	195 (48.75%) (100%) (48.75%)	400 (100%) (100%) (100%)

Chi-Square test:

Statistic	DF	Value	P-value
Chi-square	2	0.56017047	0.7557

result for "used pot" and "Forgot date"? And the Chi-Square analysis? What hypotheses did you test? What can you conclude using marijuana and dementia in this sample?

Answer 1

Null and alternative hypotheses

H₀: There is no association between used pot and Forgot date.

H_a: There is association between used pot and Forgot date.

The chi-square value = 0.56017047

P-value = 0.7557

Conclusion:

The p-value of Chi-square test is greater than 0.05. Thus we accept null hypothesis at 5% level of significance and conclude that there is no association between used pot and Forgot date. In other words we can conclude that, there is no association between using marijuana and dementia in this sample.