Ask Question
1 November, 08:24

The reading speed of a second grade students in a large city is approximately normal with a mean of 92 words per minute and a standard deviation of 10 wpm. What is the probability that a random sample of 28 second grade students from the city results in a mean reading rate of more than 96 wpm?

+2
Answers (1)
  1. 1 November, 08:36
    0
    Let X be a random variable representing the mean reading speed of a sample of second grade students in the city.

    P (X > 96) = 1 - P (X ≤ 96) = 1 - P (X ≤ (96 - 92) / (10/sqrt (28)) = 1 - P (X ≤ 2.117) = 1 - 0.98285 = 0.01715

    Required probablility = 0.01715
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “The reading speed of a second grade students in a large city is approximately normal with a mean of 92 words per minute and a standard ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers