Bone Density Test: A bone mineral density test is used to identify a bone disease. The result of a bone density test is commonly measured as a z score, and population of z score is normally distributed with a mean of 0 and a standard deviation of 1.   a.For a randomly selected subject, find the probability of a bone density test score less than 1.54.     b.For a randomly selected subject, find the probability of a bone density test score greater than -1.54.     c.For a randomly selected subject, find the probability of a bone density test score between -1.33 and 2.33     d.Find Q1, the bone density test score separating the bottom 25% from the top 75%.

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A:

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A: It is an important fact in statistics . It has got wide applications in all statistical fields .

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.