Task 02 - Vcavalcanti1975/regression_project GitHub Wiki

1. Conduct hypothesis tests to determine if the following lead to more cancer incidence Use alpha of 5%.

a. Recent trend stable vs falling (Column M)

b. Study Count (Column C). Create a new variable to recode this As High vs Low and do the hypothesis test. Break the two groups at the mean study count.

Welch Two Sample t-test

data: falling and stable t = -11.574, df = 12991, p-value < 2.2e-16 alternative hypothesis: true difference in means is not equal to 0 95 percent confidence interval: -8.088711 -5.745819 sample estimates: mean of x mean of y 448.5742 455.4915

Welch Two Sample t-test

data: high and low t = 5.5943, df = 2881.3, p-value = 2.423e-08 alternative hypothesis: true difference in means is not equal to 0 95 percent confidence interval: 3.138218 6.525248 sample estimates: mean of x mean of y 458.0340 453.2022