Normalize the following invoice INVOICE HILLTOP ANIMAL HOSPITAL DATE: JAN 13/2002 INVOICE # 987 MR. RICHARD COOK 123 THIS STREET MY CITY, ONTARIO Z5Z 6G6 PET PROCEDURE AMOUNT ROVER RABIES VACCINATION 30.00 MORRIS RABIES VACCINATION 24.00 TOTAL 54.00 TAX (8%) 4.32 AMOUNT OWING 58.32 UNF: 1NF: 2NF: 3NF:

Explain the circumstances for which the interquartile range is the preferred measure of dispersion. what is an advantage that the standard deviation has over the interquartile range? choose the correct answer below. a. the interquartile range is preferred when the distribution is symmetric. an advantage of the standard deviation is that it increases as the dispersion of the data increases. b. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation. c. the interquartile range is preferred when the distribution is symmetric. an advantage of the standard deviation is that it is resistant to extreme values. d. the interquartile range is preferred when the data are bell shaped. an advantage of the standard deviation is that it is resistant to extreme values. e. the interquartile range is preferred when the data are skewed or have outliers. an advantage of the standard deviation is that it uses all the observations in its computation. f. the interquartile range is preferred when the data are bell shaped. an advantage of the standard deviation is that it increases as the dispersion of the data increases.