The reading speed of second-grade students is approximately normal, with a mean of 90 words per minute(wpm) and a standard deviation of 10 wpm. a) What is the probability that a randomly selected student will read more than 95 words per minute? b) What is the probability that a random sample of 12-second grades students results in a mean reading rate of more than 95 words per minute? c) What effect does increasing the sample size have on the probability of obtaining a sample mean reading rate of more than 95 words per minute? why?

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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.