PS (Power and Sample Size Calculation)

for chisquare and Fisher exact tests,

171–172

definition of, 60

for survival comparisons, 324–325

pseudorsquared values,

259

PSU (primary sampling units), 86

Python, 58

R

R (software)

description of, 58

nonlinear regression, 282–286

odds ratio calculation, 183

risk ratio calculation, 180–181

straightline regression,

221

r value, 203–206

radiation exposure, 251–256, 260–263, 267, 337–338

radical sign (√), 21

random number generator (RNG), 80–81

random shuffling, 67

random variability, 158

randomization, 97, 171

randomized controlled trials (RCTs), 65–67, 98

randomness, 33

range, 120

ranks, 49

rate ratio (RR), 195–196

ratio data, 102, 107–108

rationale, 69

RCTs (randomized controlled trials), 65–67, 98

Receiver Operator Characteristics (ROC), 257, 264–265

reference level, 237