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PYC3714 Assignment 2 Semester 2 MEMO | Due 28 August 2026

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Institution University Of South Africa (Unisa)
Course Introduction to Statistical Inference in Psychological Research (PYC3714)
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PYC3714 Assignment 2 Semester 2 MEMO | Due 28 August 2026. All questions fully answered. A lecturer aims to investigate how different factors influence student success. To achieve this, she focuses on the potential impact of tutorial sessions on academic performance. Specifically, she divides students into two groups: one group attends additional tutorial sessions, while the other does not. This approach allows her to examine whether access to extra academic support leads to differences in exam performance. In addition to tutorial attendance, the lecturer is also interested in understanding how individual study habits and demographic factors may affect student outcomes. As a result, the study is guided by the following key questions:

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 Question 1

1.1. Write an appropriate research hypothesis (directional), in words.

Students who attend extra tutorial sessions will have higher average exam scores than students who
do not attend extra tutorial sessions.

1.2. Convert to formal statistical hypotheses (H₀ and H₁) using population symbols.

 μ1μ1 = population mean exam score for students with extra tutorials
 μ2μ2 = population mean exam score for students without extra tutorials

H0 : μ1 ≤ μ2
H1 : μ1 > μ2

(One-tailed, directional test)

1.3. Calculate descriptive statistics for Extra tutorial and No Extra tutorials (sample size, mean,
standard deviation).

, Let's compute:

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