CAPE Applied Mathematics Unit 1 · 2018 · Paper 1 · Question Q34

The t-test statistic is used to test the population mean when the variable X is

1. (A)normally distributed, its population variance unknown and the sample size small
2. (B)normally distributed, its population variance known and the sample size either large or small
3. (C)not normally distributed, its population variance unknown and the sample size small
4. (D)normally distributed, its population variance unknown and the sample size large