1. Twenty schools in a province are selected for external moderation. This is an example of:

A. Cluster sampling B. Stratified sampling C. Random sampling D. Systematic sampling

2. The "weakest" data type in terms of limited mathematical operations is:

A. Ratio-scaled data B. Interval data C. ordinal data D. nominal data

3. Which ONE of the following statements is TRUE?

A. Temperature is an example of ratio-scaled data. B. Ratio-scaled data has a defined "zero". C. Interval data cannot take on negative values. D. Discrete data can take on any value

4. Marks obtained by students in a Chemistry test was adjusted because of an error in one of the questions. The marks are now classified as:

A. Primary data B. Secondary data C. Regression data D. External data

Refer to the data below. 38 42 26 22 30 42 36 42

8. Which measure of dispersion in a data set is calculated using all the values in the set?

A. Range B. Standard deviation C. Semi Interquartile Range D. Inter quartile Range

10. A data set has the following measures of central location: Mean = 42, Median = 47 and Mode = 51. The data is said to be:

A. Skewed to the left B. Skewed to the right C. Symmetrical D. Linear

Questions 16 - 17 refer to the problem below. A container contains different medications in the form of tablets. Four are Paracetamol, five are antacids and 3 are laxatives. A child randomly selects two tablets, one after the other without replacement.

16. What is the probability that both tablets are antacids?

A. 0.08 B. 0.15 C. 0.12 D. 0.02

17. What is the probability that one tablet is a laxative and the other is Paracetamol?

A. 0.15 B. 0.12 C. 0.25 D. 0.18

Questions 18 - 19 refer to the problem below.

Data from medical records show that 60% of adults will develop a hiatus hernia which is the protrusion of the upper stomach through an opening in the diaphragm. A random group of 6 adults is selected.

18. What is the probability that exactly 3 out of these 6 will develop a hiatus hernia?

A. 0.28 B. 0.32 C. 0.21 D. 0.35

19. What is the probability that at least 2 out of these 6 adults will develop a hiatus hernia?

A. 0.99 B. 0.96 C. 0.91 D. 0.89

Questions 20 - 21 refer to the problem below.

The recovery time from COVID19 is normally distributed with a mean of 12 days and a standard deviation of 2 days

20. What is the probability that a randomly selected COVID19 patient recovers within a week?

A. 0.0049 B. 0.0051 C. 0.0062 D. 0.0581

21. What is the probability that a randomly selected COVID19 patient takes between 9 and 15 days to recover?

A. 0.8152 B. 0.7831 C. 0.9275 D. 0.8664