For a normal distribution, the distance between the point inflection and the mea

Question

For a normal distribution, the distance between the point inflection and the mean is of one standard deviation. a) For each percentage below, specify the number of standard deviations that corresponds to the (area) percentage of outcomes, on both sides of the mean for a normal distribution: 99.74% 95.46% 68.26% b) A Type I error when a significant difference is attributed to the data, even though one does not exist. For a 95% confidence Interval, what are the chances of observing a Type I error? Circle one. 1/50 1/10 1/20 1/100

Explanation / Answer

a) 99.74% - 3 standard deviations

95.46% - 2  standard deviations

68.26% - 1 standard deviation

b) Chance of type I error = 5% = 1/20

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