Test Hypotheses About a Population Mean with Unknown
-Find the Standardized

question 67

Multiple Choice

Test Hypotheses about a Population Mean with Unknown
-Find the standardized test statistic $t$ for a sample with $\mathrm { n } = 25 , \overline { \mathrm { x } } = 19 , \mathrm {~s} = 3$ , and $\alpha = 0.005$ if $\mathrm { H } _ { 1 } : \mu > 18$ . Round your answer to three decimal places.

• A) \(1.667\)
• B) \(1.997\)
• C) \(1.452\)
• D) \(1.239\)

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Definitions:

Air

The invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen.

Dysrhythmia

An irregularity in heart rhythm; also called arrhythmia.

Cardiac Output

The product of heart rate and stroke volume, measured in liters per minute; the amount of blood that is pumped by the heart in 1 minute.

Ventricular Fibrillation

A life-threatening heart rhythm that results in a rapid, erratic heartbeat, preventing the heart from pumping blood effectively.