8.1.21-T 5 of 7 (4 complete) The reading speed of second grade students in a lar

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8.1.21-T 5 of 7 (4 complete) The reading speed of second grade students in a large city is approximately normal, with a mean of 90 words per minute (wpm) and a standard devation of 10 wpm (a) What is the probability a randomly selected student in the city will read more than 95 words per minute? The probability is 3085 (Round to four decimal places as needed) Interpret this probability. Select the correct choice below and fill in the answer box within your choice í A. If 100 different students were chosen from this population, we would expect to read exactly 9 w ds p o B. m te If 100 different students were chosen from this population, we would expect to read less than 95 words per minute C If 100 different students were chosen from this population, we would expect 31 to read more than 95 words per minute (b) What is the probability that a random sample of 13 second grade students from the city results in a mean reading rate of more than 95 words per minute? The probability is (Round to four decimal places as needed.) Enter your answer in the answer box and then click Check Answer Clear All parts remaining O Type here to search

Explanation / Answer

a)

b)

( please try 0.0359 if above does not work due to rounding)

for normal distribution z score =(X-?)/? here mean=       ?= 90 std deviation   =?= 10.0000

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