Reference no: EM132483662
The result of sampling independent populations:
sample 1 from population 1
- mean 1000
- sample standard deviation 400
- sample size 50
sample 2 from population 2
- mean 1250
- sample standard deviation 500
- sample size 75
Test H0: population1 mean = population2 mean at ?levelofsignificance=0.01
HA: population1 mean = population2 mean
This is a two-tailed test with both a negative lower critical value and a positive upper critical value. Separate variances is assumed
Choose best option:
(a) Test statistic of 65.28 > Critical value of -2.36. H0 is not rejected. Conclude difference of means greater = 0.
(b) Test statistic of -3.09 < Critical value of -1.29. H0 rejected. Conclude difference of means NOT equal = 0.
(c) Test statistic of -65.28 > Critical value of -1.29. H0 rejected. Conclude difference of means = 0.
(d) Test statistic of -3.09 > Critical value of -2.62. H0 rejected. Conclude difference of means NOT equal = 0.
(Note to Tutor: Please share step by step / clear instructions on how you arrived at the solution)