Question No.1 (a)Describe the four characteristics of a distribution. (b)The following data are given to an economist for the purpose of economic analysis. The data refer to the length of a certain type of battery: n = 100, ?fd = 30, ?fd² = 1970, ?fd³ = 2948,, ?fd? = 86,752 Where d=X-48. Do you think that the distribution is platykurtic? (c)The second moments about mean of two distributions are 9 and 16, while the fourth moments about mean are 230 and 780 respectively. Which of the distribution is (i) leptokurtic (ii) mesokurtic (iii) platykurtic?
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