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An experimenter wishes to have his confidence intervals width in a tight band, i.e. he doesn’t wish to have a broad range. What should he do?

OPTIONS

Increase the confidence level
Increase the sampling size
Increase the significance level
Increase the Power

ANSWER

Increase the sampling size

EXPLANATION

The Margin of Error can be reduced by increasing the sampling size, although significance level also plays an important part but “Increase the sampling size” is the best possible answer.

«Find the range of population

For a data meeting normality conditions, which of the tests mentioned below would you use to test if the data comes from the population assuming sample size is 35 and if you wish to test means?»