Find the Standardized Test Statistic to Test the Claim That $\mu _ { 1 } = \mu _ { 2 } .$

Multiple Choice

Find the standardized test statistic to test the claim that $\mu _ { 1 } = \mu _ { 2 } .$ Assume the two samples are random and independent.
Population statistics: $\sigma _ { 1 } = 1.5 \text { and } \sigma _ { 2 } = 1.9$ Sample statisticsstatistics: $\bar { x }_ 1 = 24 , \mathrm { n } _ { 1 } = 50 \text { and } \bar { x }_ 2 = 22 , n _ { 2 } = 60$

A) 6.2
B) 8.1
C) 4.2
D) 3.8