The reading speed of second grade students in a large city
Last updated: 11/25/2023
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 a What is the probability a randomly selected student in the city will read more than 97 words per minute The probability is 0 0071 Round to four decimal places as needed Interpret this probability Select the correct choice below and fill in the answer box within your choice OA If 100 different students were chosen from this population we would expect per minute OB If 100 different students were chosen from this population we would expect per minute OC If 100 different students were chosen from this population we would expect minute to read less than 97 words to read more than 97 words to read exactly 97 words per b What is the probability that a random sample of 12 second grade students from the city results in a mean reading rate of more than 97 words per minute The probability is Round to four decimal places as needed Interpret this probability Select the correct choice below and fill in the answer box within your choice OA If 100 independent samples of n 12 students were chosen from this population we would expect sample s to have a sample mean reading rate of less than 97 words per minute OB If 100 independent samples of n 12 students were chosen from this population we would expect sample s to have a sample mean reading rate of more than 97 words per minute OC If 100 independent samples of n 12 students were chosen from this population we would expect sample s to have a sample mean reading rate of exactly 97 words per minute c What is the probability that a random sample of 24 second grade students from the city results in a mean reading rate of more than 97 words per minute The probability is Round to four decimal places as needed Interpret this probability Select the correct choice below and fill in the answer box within your choice A If 100 independent samples of n 24 students were chosen from this population we would expect sample s to have a sample mean reading rate of less than 97 words per minute OB If 100 independent samples of n 24 students were chosen from this population we would expect sample s to have a sample mean reading rate of exactly 97 words per minute OC If 100 independent samples of n 24 students were chosen from this population we would expect sample s to have a sample mean reading rate of more than 97 words per minute d What effect does increasing the sample size have on the probability Provide an explanation for this result