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Gekata [30.6K]
3 years ago
6

A 95% confidence interval for a population mean is determined to be 100 to 120. For the same data, if the confidence coefficient

is reduced to .90, the confidence interval for μ a. becomes wider. b. becomes narrower. c. becomes 100.1 to 120.1. d. does not change.
Mathematics
1 answer:
eimsori [14]3 years ago
4 0

Answer:

b. becomes narrower.

Step-by-step explanation:

Since the 95% confidence interval for a population mean could find out from 100 to 120

And based on this, the coefficient confidence level is declined to 0.90

Therefore the confidence interval for mean should become narrowed

As a 95% confidence interval represents narrower and 99% confidence interval represents wider

Therefore the option B is correct

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