CAPE Applied Mathematics Unit 1 · 2017 · 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 is unknown and the sample size is small
2. (B)normally distributed, its population variance is unknown and the sample size is large
3. (C)not normally distributed, its population variance is unknown and the sample size is small
4. (D)normally distributed, its population variance is known and the sample size is either large or small