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Ariah Henry
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The reading speed of second grade students in a large city is approximately normal, with a mean of 92 words per minute (wpm) and a standard
deviation of 10 wpm. Complete parts (a) through (f).
The probability is 0.0287.
(Round to four decimal places as needed.)
Interpret this probability. Select the correct choice and fill in the answer box within your choice.
(Round to the nearest whole number as needed.).
A. If 100 different samples of n = 10 students were chosen from this population, we would expect 3 sample(s) to have a sample mean reading
rate of more than 98 words per minute.
B. If 100 different samples of n = 10 students were chosen from this population, we would expect sample(s) to have a sample mean
reading rate of exactly 98 words per minute.
C. If 100 different samples of n = 10 students were chosen from this population, we would expect sample(s) to have a sample mean
reading rate of less than 98 words per minute.
(c) What is the probability that a random sample of 20 second grade students from the city results in a mean reading rate of more than 98 words
per minute?
The probability is.
(Round to four decimal places as needed.)
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9:58 PM
05/15/2025