Question

David Wise handles his own investment portfolio, and has done so for many years. Listed below is the holding time between purchase and sale for his collection of 36 stocks. 8, 8, 6, 11, 11, 9, 8, 5, 11, 4, 8, 5, 14,7, 12, 8, 6, 11, 9, 7, 9, 15,8, 8, 12, 5, 9, 8, 5, 9, 10, 11, 3, 9, 8, 6 Arrange the data into equal class intervals of six's (6's) and determine the following: a. Class range b. Class width c. Class interval column d. Class frequencies e. Class midpoints f. Class mean g. Modal class h. Class variance i. Class standard deviation

Answer 1

H)

the modal class intervals are 6 up to 8 which containing highest frequency.

And modal class will be the group containing the 15, as 15 is the highest frequency.