Question

create a complete task for z-test and solve it with detailed explanation.

Answer 1

Task for Z-test: Test at 5% significant level whether population mean u of population of 100 people is significantly different from 23.5 given that the sample mean is 26.5 and standard deviation 4.5.

Solution:
Since sample size=100 which is greater than 30, then Z-test will be suitable and this is univariate because here is single variable