Question: The memory scores in this sample are approximately normally distributed. This conclusion is supported by both visual and statistical evidence. First, a visual inspection of
The memory scores in this sample are approximately normally distributed. This conclusion is supported by both visual and statistical evidence. First, a visual inspection of the histogram with a superimposed normal curve revealed a relatively symmetrical shape, with most scores clustering around the mean and no extreme skewness or outliers. Second, the skewness value was .273, which falls within the acceptable range of 2.0, suggesting that the distribution does not substantially deviate from normality. According to Adams and McGuire (2022), a distribution can be considered normal when the skewness falls within the range and the data form a bell-shaped curve. Therefore, based on both the histogram and the skewness statistic, the data meet the assumption of normality
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