Inference Tests

Question 1

One sample z - test for a Population Mean

Answer 1

POPULATION MEAN unknown:

SRS, normal distribution

Question 2

One sample t - test for a Population Mean

Answer 2

Both POPULATION MEAN and STANDARD DEVIATION unknown:

SRS, normal distribution

Question 3

Two sample t - test for Comparing Two Means

Answer 3

All MEANS and STANDARD DEVIATIONS unknown:

2 SRSs, normal distribution, samples independent

Question 4

One sample Proportion z- test for Pop. Proportion

Answer 4

PROPORTION p unknown:

SRS, pop at least 10x sample, For test of H0 : p = p0, n= large (np0, n(1-p0) >10)

Question 5

Two sample Proportion z -test for Comparing Two Props.

Answer 5

PROPORTIONS unknown:

2 SRSs, pop at least 10x sample, (np, n(1-p) > 5 etc)