According to the give below, where in the 40th percentile? 6-7 class interval 1-

Question

According to the give below, where in the 40th percentile? 6-7 class interval 1-2 class interval 8-0 class interval 4-5 class interval The primary aim of a study by et al. is investigate the effect of the age of onset of bipolar disorder on the course of the One of the variables investigated was family history of blood disorders. The table below shows the frequency of a family history of disorders in the two groups of interest ("Early age" at defined to be 10 years or younger and "Later age" at defined as lesser than 18 years). Suppose we pick a person at random from this sample. What is the probability that this person will have a family history of both unipolar and bipolar disorders? 1.0 2.8094 3.3583 4.1792 5.8079

Explanation / Answer

40-th percentile is that value below which 40% of the observation lies. From the graph 40-th percentile will be the 8-9 class interval. (Ans).

113 of the cases out of 318 has got both Unipolar and Dipolar. So the required probability = 113/318 = 0.3553. (Ans).

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