A 95% Confidence Interval for a Population Mean Is Determined

question 102

Multiple Choice

A 95% confidence interval for a population mean is determined to be 100 to 120. If the confidence coefficient is reduced to .90, the interval for μ _____.

• A) becomes narrower
• B) becomes wider
• C) does not change
• D) becomes .1

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Definitions:

Pollen Grains

Microscopic particles produced by the male structures of seed plants, responsible for carrying the male gametes to the female structure for fertilization.

Ovary

(1) In animals, one of the paired female gonads responsible for producing eggs and sex hormones. (2) In flowering plants, the base of the carpel that contains ovules; ovaries develop into fruits after fertilization.

Pistil

The female reproductive part of a flower, consisting of the ovary, style, and stigma.

Ovules

Ovules are the structures in seed plants that develop into seeds after fertilization.