\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
A nutritionist wants to test if a specific diet changes cholesterol levels. The cholesterol levels of 6 patients are measured before starting the diet and after 4 weeks.
Patient 1 2 3 4 5 6
Before 210 235 208 190 245 220
After 205 228 210 192 240 215
Test at the \(5\pourcent\) significance level whether there is a change in cholesterol levels.
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