Question

The reading speed of second grade dents in a large city is approximately normal with a mean of 90 words per minute wpm) and a standard deviation of 10 wpm. Complete parts(a) through in Click here to view the standard normal distrution table Click here to view the standard normal distribution to oil page 2 al What the probability a randomly selected hudent in the city will read more than 96 words per minute? The probability is Round a fou dermal places as needed.) interpret this probably Select the correct choice below and fill in the answer box within your choice DA IH 100 darent students were chosen from this population, we would expect to read more than 96 words per minute, DB I 100 de dents were chosen from this population, we would expect to read less than words per minute C 100 diferent students were chosen from this population, we would expect to read exactly words per minute b) What the probability that a random sample of 10 second grade students from the city results in a mean reading rate of more than 5 words per minute? The probability Round to four decimal places as needed.) sterpret this probability Select the correct choice below and in the answer box within your choice. A 100 dient samples of 10 students were chosen from this population we would expect samples to have a sample mean reading rate of exactly 96 words per 3. If 100 erant samples of n. 10 shadents were chosen from this population we would expect sample(s) to have a sample mean reading rate of more than 5 words per minute OG 100 different samples of 10 students were chosen from this population we would expect samplesito have a sample mean reading rate of less than 96 words per le) What is the probability that a random sample of 20 second grade students from the city is in a mean reading rate of The probability is Interpret this probat Select the come choice below and it is the answer box within your choice A 100 dient amples of 20 students were chosen from this population, we would expect samples to have a sample mean reading rate of less than words per menu 100 d an son20 w were those from this population, we would expect samples to have a sample mean ading rate of coudy 6 words B. c. 100 a nsamos 20 Sample to h dere e chos from this population, we would expect aring af more than words per

Answer 1

Solubion; - {Z = X-4} lo el= 90 5=10 a) Plx396) = Plas 96-90 ) - Plz) 0.6) - 0.27 43 by I loo Student we expert mp 100x 0.2743 = 2 7 7 students 0. 27 43 I b) P/Fs 96) = P( 23 96-90) =P ( 23 1.90) lo Vio 0.0287 In 100 student we expect = 1008 0.0287 3 samples som ble 9 P (5 396) P12) 96-90) - P12>2:08) - 0.00371 Im loo studet Expect sombles of ro m=20, we somplex.