SOLUTION: 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.
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-> SOLUTION: 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.
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Question 1186289: 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.
What is the probability that a random sample of 10 second grade students from the city results in a mean reading rate of more than 98 words per minute?
You can put this solution on YOUR website! z=(x bar-mean)/sigma/sqrt(n)]
>6/(10/sqrt(10)
>1.897
probability is 0.0289
recognize that 10/sqrt(10)=sqrt(10)
so the probability is 6/sqrt (10)
sqrt is the square root of
yes, sqrt*(x)*sqrt(x)=x
