?Reading Rates The reading speed of sixth-grade students is approximately normal, with a mean speed of 125 words per minute and a standard deviation of
Chapter 7, Problem 38(choose chapter or problem)
Reading Rates The reading speed of sixth-grade students is approximately normal, with a mean speed of 125 words per minute and a standard deviation of 24 words per minute.
(a) Draw a normal model that describes the reading speed of sixth-grade students.
(b) Find and interpret the probability that a randomly selected sixth-grade student reads less than 100 words per minute.
(c) Find and interpret the probability that a randomly selected sixth-grade student reads more than 140 words per minute.
(d) Find and interpret the probability that a randomly selected sixth-grade student reads between 110 and 130 words per minute. 0.3189
(e) Would it be unusual for a sixth grader to read more than 200 words per minute? Why?
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