Paper 3 · June 2023 · Statistics: measurement scales, Poisson, chi-square, spatial autocorrelation

A chi-square test of independence is performed on a contingency table with 2 rows (males, females) and 3 columns (age 20-30, 31-40, 41-50). State the number of degrees of freedom.

Model answer

Also accepted: 2 degrees of freedom, df = 2

Explanation

Degrees of freedom for a contingency table = (rows - 1)(columns - 1) = (2 - 1)(3 - 1) = 2. The 5 per cent critical value at 2 degrees of freedom is 5.991.

Derived from ZIMSEC Advanced Level Geography 6037/3 Paper 3 Practical Test, June 2023 session, Q1

View this paper's sittings and topics→

More questions from this paper

A chi-square test on cholera cases by age and sex at Musiso Mission hospital gives a test statistic of about 0.08 with 2 degrees of freedom, against a 5 per cent critical value of 5.991. What is the correct conclusion?
Give one recognised index of spatial autocorrelation used in geographical analysis.
Why does spatial autocorrelation matter when a geographer applies classical statistical tests to spatial data?
The Masembura 1:50 000 extract shows steep sided hill masses rising to trigonometrical stations at 1315.8 m and 1317.2 m, standing well above a gently undulating plateau surface cut across the same granite. What is the most likely explanation for these hills?
The Masembura extract shows streams rising in wide, flat, marshy headwater depressions on the plateau surface, which are seasonally waterlogged and lie where the water table intersects a low gradient surface. Give the local Zimbabwean name for this landform.

Get the full paper, not just one question

Danho has every sitting for this paper, with your progress tracked question by question, offline.

Get it on Google Play Download on the App Store