Question: Choose the correct answer inside the brackets. (a) The higher the precision, the [shorter, wider] the confidence interval for , holding everything else constant. (b)

Choose the correct answer inside the brackets. (a) The higher the precision, the [shorter, wider] the confidence interval for , holding everything else constant. (b) Increasing the level of confidence, holding everything else constant, [increases/decreases] precision in estimating , holding everything else constant. (c) The higher the variance of the population distribution, the [shorter, wider] the confidence interval for , holding everything else constant. (d) The larger the sample size, the [shorter, wider] the confidence interval for , holding everything else constant

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