Statistics 9ST0/02 June 2023 | Edexcel A Level Past Papers With Mark Scheme

Edexcel A Level Statistics (9ST0) Jun 2023

معلم موافق رایگان بودن است.

1. Wilcoxon rank-sum test for comparing final points between Asian and non-Asian players, criticism of biased conclusions and causality inference, suggestion to use full dataset or match by ability level

2. Chi-squared test of independence on colour preference vs. home location among 4–11-year-old girls, analysis limited by unequal age group proportions, proposal for stratified sampling design

3. One-sample t-test for women’s league goal average vs. men′s fixed mean, second hypothesis test for yellow card rate comparison, results supporting more goals and fewer yellow cards in women’s league, article synthesis for general audience

4. Comparison of sign test vs. Wilcoxon signed-rank test: both for matched pairs, Wilcoxon requires symmetrical distribution of differences, sign test uses only direction of difference

5. One-way ANOVA on wing size across butterfly generations, randomized block design adaptation using location as block, correlation analysis between distance and abnormality rate with hypothesis testing for negative association

6. Sleepiness study analysis using p-value (0.04) showing significance, Cohen’s d (0.49) indicating moderate effect size, conclusion supports blue light reducing sleepiness levels slightly but significantly

7. Paired t-test setup for difference in food consumption, explanation of normality requirement for difference not individual groups, hypothesis test on hunger rating differences justifying its exclusion, definition of non-parametric tests as distribution-free methods for ordinal or non-normal data.