1. Distinguish between stratified random sampling and simple random sampling.
2. What processes lead to the following distributions:
i. Rectangular distributions:
ii. Normal distribution
3. Calculate the median for the following sample 20.1,2.3, 4.4, 6.5, 10.6, 20.1
4. Distinguish between binomial and Poisson distribution.
5. What problems arise from carrying out multiple t-tests rather than ANOVA for more than two samples?
6. Distinguish between correlation coefficient and coefficient of determination.
7. Under what circumstances in the chi-square analysis are the following undertaken:
i. Yates correction
ii. Heterogeneity testing
8. What do you understand by the following terms:
i. Degrees of freedom
ii. Sampling distribution
9. Attach confidence intervals for the following normally distributed sample:
Mean = 2.65kg sample size = 112 standard deviation = 4.6 kg
10. List the assumptions of parametric statistical testing.

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