Suppose that the national norm of a science test for 12th graders on a particular year has
Question:
(a) A random sample of 55 12th graders is selected. What is the probability that this group will average more than 230?
(b) A random sample of 200 12th graders is selected. What is the probability that this group will average over 230?
(c) A random sample of 35 12th graders is selected. What is the probability that this group will average over 230?
(d) How does the sample size influence the probability?
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Mathematical Statistics With Applications In R
ISBN: 9780124171138
2nd Edition
Authors: Chris P. Tsokos, K.M. Ramachandran
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