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In this example we are figuring out the probability of randomly picking a non-blue marble from a bag. Lifetime (hours) 0–199 200–399 400–599 600–799 800–999 1000–1199 1200–1999 Frequency 143 97 64 51 14 14 17 A data set is a collection of responses or observations from a sample or entire population.. There is no other text for a first course in social work statistics that teaches students, step-by-step, how to use Excel to solve interesting social work statistics problems. Ex 14.1 Class 10 Maths Question 1. : Mohammad Ahsanullah, Valery B. Nevzorov. Evaluate the probability of the following events: (a) A= The experiment ends before the 6th toss. The beauty of statistics is that it has many different tools … The contents of the book cover the syllabi of various Indian universities and B-schools. The text assumes some knowledge of intermediate algebra and focuses on statistics application over theory. 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