A random sample of size 21 was taken from a normal population. The sample average was 9.87 and the sample SD was 1.17. At the significance level of 10%, what test should you use for testing whether the population mean equals 9.7?
Question 36 options:
One sample z-test for the population mean.
two sample z-test for the population means.
One sample z-test for proportions.
two sample z-test for proportions.
one sample t-test for the population mean.