Question

URERE-63088-MATH 1127 Nand Zisengy Test: Unit 3 Test Time Rema This Question: 1 pt 12 of 13 (D complete) The reading speed of second grade students in a large cty is approximately normal, with a mean of 91 words per minute (wpm) and a standard deviation of 10 wpm. Complete parts (a) through ((e) (a) What is the probability a randomly selected student in the oity will read more than 97 words per minute? The probability is (Round to four decimal places as needed) (b) What is the probability that a random sample of 20 second grade students from the city resuts in a mean reading rate of mone than 97 words per minute? The probability in (Round to four decimal places as needed) (c What effect does increasing the sample size have on the probablity? Provide an explanation for this result OA Increasing the sample size decreases the probability because a; inoreases as n inoreases OB. Increasing the sample size increases the probability because a increases as n increases O C. Increasing the sample size decreases the probability because a; decreases as n increases O D. Increasing the sample size increases the probability because e, deoreases as n increases Cick to select your answeris)

Answer 1

Camlin Page Date AL,62) Soluhian lgt X-y 10 tstto -1 0.2342 O.2342 o-2342 The pnbabiliy js n20 p LF) 97-9) 0.9463

C. Tnatasing the Sample sizc decseaes the pobability ccause Gxdecreas nincaeaSes ses 10