Question: Write a function called qcd(), short for quartile coefficient of dispersion. This function takes two arguments, the required x, which is a numeric vector; and

Write a function called qcd(), short for quartile coefficient of dispersion. This function takes two arguments, the required x, which is a numeric vector; and the optional na.rm, which indicates whether NAs should be removed from x. The default value for this argument should be FALSE. The function returns the single numeric value that is the ratio of the interquartile range (75th percentile minus 25th percentile) to the sum of the lower (25th percentile) and upper (75th) percentiles

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