A Statistician Claims That the Standard Deviation of the Weights

question 29

Multiple Choice

A statistician claims that the standard deviation of the weights of firemen is less than 25 pounds. A sample of 20 randomly chosen firemen had a standard deviation of their weights of 26.2 pounds. Assume the variable is normally distributed. At α = 0.05, what is the critical value χ² for this test?

• A) 31.410
• B) 30.144
• C) 10.851
• D) 10.117

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Definitions:

Auscultation

A clinical technique of listening to the internal sounds of the body, usually using a stethoscope, as part of a medical examination.

Genitourinary Examination

A medical evaluation of the genital and urinary systems to identify or rule out pathological conditions.

Uncircumcised Glans Penis

The tip of the penis covered by the foreskin, which has not been removed by circumcision.

Sexually Transmitted Infection

Infectious process spread through sexual contact, including oral, genital, or anal sexual activity.