Group A
Hřebíčková, Sau


A. Dependence of THC concentration in blood on the amount of cannabis smoked was analyzed in one
person who smoked different amounts of dried cannabis of the same source. The intervals between
measurements were long enough to decrease of THC concentration to 0 before each trial.
•

Analysis
•0 hypothesis: THC concentration in blood does not depend on the amount of cannabis smoked.
•
•thc <- read.delim2("clipboard")
•summary(thc)
•View(thc)
•
•lm.thc <- lm(THC~DW,data=thc)
•plot(lm.thc)
•anova(lm.thc)

Results
•Analysis of Variance Table
•
•Response: THC
•Df  Sum Sq Mean Sq F value   Pr(>F)
•DW         1 128.999 128.999  12.509 0.007655 **
•  Residuals  8  82.497  10.312
•---
•  Signif. codes:
•  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
•
summary(lm.thc)
Call:
lm(formula = THC ~ DW, data = thc)
Residuals:
    Min      1Q  Median      3Q     Max
-4.9687 -1.4006 -0.2593  1.4734  6.2498
Coefficients:
            Estimate Std. Error t value Pr(>|t|)
(Intercept)   1.6650     2.5453   0.654  0.53138
DW            1.4160     0.4003   3.537  0.00765 **
---
Signif. codes:
0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
Residual standard error: 3.211 on 8 degrees of freedom
Multiple R-squared:  0.6099, Adjusted R-squared:  0.5612
F-statistic: 12.51 on 1 and 8 DF,  p-value: 0.007655







Conclusion
•We reject the null hypothesis, there is a significant relationship between the THC concentration
in blood and the amount of cannabis smoked
•

> The best Cannabis ETFs | justETF
•Thanks for
•your attention