Observations flagged as outliers generally should be retained when they are not coding errors, when they are plausible values of the variable in question, and when they do not greatly affect the value of the mean.
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Q8: Boxplots are used for preliminary data analysis.
Q9: The boxplot is used with ordinal-level data.
Q10: The interquartile range is defined as the
Q11: Values above the upper fence are defined
Q12: The inner fence is an observed value.
Q14: The normal distribution refers to the distribution
Q15: The standard deviation is a desirable statistic
Q16: When variables are normally distributed, about 95%
Q17: Standardized variables have a mean of zero
Q18: Skewness is a measure of whether the
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