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The following table presents data on political party affiliation and class level for sample of students in certain university:
Class LevelFreshman Sophomore Junior Senior TotalParty Democratic 51 24 35 43Republican 94 68 74 82Other 31 33 13 22Total
If the student is selected at random from sample, determine the probability that student is.
a. ...a Republican?b. ...a sophomore?c. ...not Democrat nor a Republican but junior?d. ...a Democratic or senior?e. ...a Republican, given that they are freshman?f. ...not junior or senior, if they are not Democrat?
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A sample of n=20 has a mean of M=40. If the standard deviation is s=5, would a score of x=55 be considered an extreme value?
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