IOP2601 Assignment 2 ANSWERS 2025 - Due 25 August 2025

IOP2601
ASSIGNMENT 2 2025
DUE: 25 AUGUST 2025




SEMESTER 2 2025

, IOP2601 ASSIGNMENT 2 2025

ASSESSMENT 2 25 August 2025 at 14:00

SEMESTER 2 2025




1.1 Inferential statistics. (Study guide, p.10)

1.2 True. - The single-sample t-test tests whether a sample mean equals a
known/population mean. (Study guide, p.133)

1.3 True. - A scale has equal-interval property when differences between all adjacent
points are uniform. (Study guide, p.10)

1.4 Type I error. - rejecting H₀ when it is actually true. (Study guide, p.10)

1.5 Constant. - a quantity that does not change and always has the same value. (Study
guide, p.10)




1.6 Properties of observations that can assume different values are called
variables, whereas a variable that can assume any value (within a range) is a
continuous variable. (Study guide, p.10)



1.7 For the three predictor–outcome examples given



(a) IV: Amount of red wine consumed. DV: Rate of heart attacks.

Justification: Wine consumption is the predictor/exposure; heart-attack rate is the
outcome measured. (Study guide, p.133)