7. In the absence of the population variance and/or if the sample size is small, which sampling distribution is being used? *

A. p distribution

B. chi distribution

C. z-distribution

D. t-distribution

8. In Student's t-distribution, if the sample size is 25, what is the degree of freedom?

A. 5

B. 24

C. 25

D. 26

9. When do you use t-distribution instead of normal distribution? *

A. When the sample size is greater than or equal to 30

B. When the sample size is less than 30.

C. If the sample standard deviation is unknown

D. If the population standard deviation is known

10. The population of Senior High School learners in Mapayapa Integrated School has a mean of 54.5 and a standard deviation of 8.6. If a sample of size 12 is taken at random from this population, which of the following statements is correct? *

A. The standard deviation of the sampling distribution of the sampling mean is 54.5.

B. The mean of the sampling distribution of the sample mean is equal to 54.5.

C. The mean of the sampling distribution of the sample mean is less than 54.5

D. The standard deviation of the sampling distribution of the sampling mean is 8.6