Statistics assignment

pac... Heading 1 Heading 2 Title Paragraph Subtitle Su J. . . 1 . . . 1 , . . 1 . . . 2 . . . 1 . . . 3 . . . 1 . . . 4 . . . 1 . . . 5 . 1 5 1 . . . 6 . . . 1 Styles 30 randomly selected light bulbs were tested to determine their lifetimes (in hours): This frequency distribution was obtained. Class boundaries Frequency 4.5-9.5 8 9.5 -14.5 4 14.5-19.5 3 19.5- 24.5 6 24.5- 29.5 9 You are required to calculate the following: i. The Mean (to the nearest whole #) (4 mks) ii. The Mode (3 mks) iii. The median (3 mks) iv. The Standard Deviation (to the nearest whole #) (5 mks) v. In how many standard deviations about the mean would we find 90% of the data set? Nearest whole # (2 mks) vi. Calculate the Pearson coefficient of skewness correct to the nearest hundredth and explain what it says about the data set. (3 mks)