Please help with problem c Homework: Chapter 8 Homework core: 0.4 of 1 pt 3 of 8

Question

Please help with problem c

Homework: Chapter 8 Homework core: 0.4 of 1 pt 3 of 8 (a complete) Hw Score: 61 25%, 4 9 of a 8.1.21 Question Help The reading speed of second grade students in a large city s approxemately normal, wits a mean of 91 wonds per minute (wpm) and a standard devation of 10 wpm Complete parts (a) through (e) (a) What is the probabiily a randomly selecled student in the city wil read more than 95 words per minute? The probability is 0.3446 (Round to four decimal places as needed.) (b what is the probabiity that a random s mple of 11 second grote students from the city results n mean readng rote of more than 95 words per m nute? The probsbility is 0.0018 Round to four decmal places as needed (e) What is the probablity that a random sample of 22 second grade ( students from Peity results in o mean reading rate of more han 95 words per minute? The prob abity is (Round to four decimal places as needed.j Enter your answer in the answer bax and then click Chack remaning

Explanation / Answer

Ans:

c)that

mean=91

standard deviation=10

sample size=22

standard error of mean=10/sqrt(22)=2.132

z=(95-91)/2.132=1.876

P(z>1.876)=0.0303

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