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. What is the probability that a randomly selected sixth-grade student reads less than 100 words per minute?
Accepted Solution
A:
Answer:0.148783124Step-by-step explanation:the probability that a randomly selected sixth-grade student reads less than 100 words per minuteP(X < 100)
= P(z < (100 - 125)/24))
= P(z < -1.0417) (from the z-table)= 0.148783124