A Study Was Conducted to Determine If the Salaries of Librarians

question 20

Multiple Choice

A study was conducted to determine if the salaries of librarians from two neighboring cities were equal. Asample of 15 librarians from each city was randomly selected. The mean from the first city was $28,900 with astandard deviation of $2300. The mean from the second city was $30,300 with a standard deviation of $2100.Construct a 95% confidence interval for $$\mu _ { 1 } - \mu _ { 2 }$$

• A) (-3125, 325)
• B) (-2054, 238)
• C) (-2871, 567)
• D) (-4081, 597)

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Definitions:

Matrix Limitation

Constraints related to a matrix structure in mathematics or computing, including dimensions, storage, or computational complexity.

Outputs

The results or actions produced by a computer system, electronic device, or process, following processing or operation.

Rung

A level or step in a ladder diagram, which is a traditional representation of a circuit or network in PLC programming, consisting of conditions leading to one or more outputs.

Nesting

The practice of placing one control structure within another, such as loops or conditional statements in programming.