ost per serving (in cents) for six high-fiber cereals rated very good and for nine high-fiber cereals rated good by a magazine are shown below. Cereals Rated Very Good 46 49 63 41 19 78 Cereals Rated Good 72 30 53 53 69 43 48 28 54 ombining the cost-per-serving data for high-fiber cereals rated very good and those rated good from above gives the following data set. 46 49 63 41 19 78 72 30 53 53 69 43 48 28 54 (a) Calculate the quartiles and the interquartile range for this combined data set. (b) Calculate the interquartile range for just the cereals rated good. Is this value greater than, less than, or about equal to the interquartile range computed in part (a)? P1 (a) Calculate the quartiles and the interquartile range for this combined data set. he given data are as follows. 46 49 63 41 19 78 72 30 53 53 69 43 48 28 54 egin by arranging the combined data in numerical order, smallest to largest. 9 28 30 41 43 43 46 48 49 53 53 54 63 69 72 78 53 he next step is to locate the median. The median, or middle number, divides the data into two equally sized halves. In other words, 50% of the ata are less than the median and 50% of the data are greater. The number of observations, n, in the data set influences how to find the value f the median. When n is odd, the single middle value is the median. When n is even, the median is the average of the middle two values. For his data set, n is odd v odd , so the median is the single middle value single middle value he median for this data set is 49.73333 49