5
(Choose 1 answer)
(See picture)
(round to 4 decimal places).
A. 2.3123
B. None of the others
C. -5.4431
D. 1.8229
, and you are testing:
Ho
H: MM2
Assume that \sigma_{1}=10 ; \sigma_{2}=15 In addition, from 2 samples we have n_{1}=30; \overline{x_{1}}=72; n_{2}=30; x_{2}=66 . What is the value of the Z test statistic?
