A Doctor Claims That the Standard Deviation of Systolic Blood

question 47

Multiple Choice

A doctor claims that the standard deviation of systolic blood pressure is 12 mmHg. A random sample of 24 patients found a standard deviation of 14 mmHg. Assume the variable is normally distributed. At α = 0.01, what are the critical χ² values?

• A) 9.262 and 44.181
• B) 13.091 and 35.172
• C) 13.848 and 36.415
• D) 11.524 and 44.314

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Definitions:

Intermediaries

Agents or businesses that act as a middleman in the distribution process or transactions between producers and consumers.

Agents

An intermediary who brings buyers and sellers together and facilitates the exchange.

Brokers

An intermediary who represents clients who buy or sell specialized goods or seasonal products.

Wholesalers

An intermediary who buys products in bulk from producers and resells them to other wholesalers or to retailers.