Assume that songs the lengths of songs released in 2020 are normally distributed with a mean of 210 seconds and a standard deviation of 37 seconds. Find the following   a. Percent of songs that were less than 2 minutes 30 seconds (150 seconds) b. Percent of songs that were over 4 minutes long (240 seconds) c. Percent of songs that were between 3-4 minutes long.

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Q: ? a. z = 0.91 b. z = -0.91 c. z = 0.43 d. z = -0.43

A: Solution

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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.