In Performing a Hypothesis Test Where the Null Hypothesis Is

question 46

Multiple Choice

In performing a hypothesis test where the null hypothesis is that the population mean is 23 against the alternative hypothesis that the population mean is not equal to 23, a random sample of 17 items is selected.The sample mean is 24.6 and the sample standard deviation is 3.3.It can be assumed that the population is normally distributed.The degrees of freedom associated with this are _______.

• A)17
• B)16
• C)15
• D)2
• E)1

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Definitions:

Esotropia

A condition where one or both eyes turn inward, often referred to as "crossed eyes."

Accommodation

The ability of the eye to change its focus from distant to near objects, involving the adjustment of the lens shape.

Phacolysis

The surgical dissolution or fragmentation of the lens of the eye, usually to treat cataracts.

Phacoemulsification

A surgical method used to remove cataracts from the eye through the use of ultrasonic energy to emulsify the lens.