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. What test should you use for testing whether the population mean equals 9.7?
Question 4 options:
1)
One sample z-test for the population mean.
2)
two sample z-test for the population means.
3)
One sample z-test for proportions.
4)
two sample z-test for proportions.
5)
one sample t-test for the population mean.
6)
None of our hypothesis tests fit.
1) One sample z-test for the population mean.
In this case, we are given a random sample from a normal population and we want to test whether the population mean equals a specific value (9.7). Therefore, the appropriate test to use is a one sample z-test for the population mean.