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

question 119

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: $\sigma _ { 1 } = 45 \text { and } \sigma _ { 2 } = 25$ Sample statistics: $\bar { x } 1 = 480 , n _ { 1 } = 100 \text { and } \bar { x } { 2 } = 465 , n _ { 2 } = 125$

• A)2.99
• B)2.81
• C)1.86
• D)0.91

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Definitions:

Customers Served

The number of customers who receive service from a business within a specified period, indicating the reach or impact of the business's operations.

Activity Variances

The difference between the budgeted costs based on standard activity levels and the actual costs incurred, related to specific business activities.

Activity Variances

Differences between the expected levels of activity used for costing purposes and the actual levels of activity observed, which can impact on cost calculations.

Total Expenses

The sum of all costs and expenses incurred by a business during a specific period, including operational and non-operational costs.