Assumptions of t distribution and normal distribution
Do one of the following as appropriate" find the critical value Zα/2, find out the critical value tα/2, or state that neither the normal nor the t distribution applies.
Assume the population is normally distributed, the confidence level is 95%, n = 12, and σ is unknown.
Which statement applies to this situation?
a) You must find the critical value Zα/2.
b) You must find the critical value tα/2
c) neither the normal nor the t distribution applies.
What is the critical value?
tα/2 = _____________ ( Round to the nearest thousandth).