To find: An invalid way of choosing a random sample of 5 students from a class of 13.
Option D is correct.
By assigning numbers from 1 to 13 and then entering “randInt (1, 13)” on the calculator until five different numbers is a valid way of choosing a random sample of 5 students from a class of 13, because the choosing each student is equally likely.
By assigning numbers from 5 to 17 and then entering “randInt (5, 17)” on the calculator until five different numbers is a valid way of choosing a random sample of 5 students from a class of 13, because the choosing each student is equally likely.
By giving a heart suit card to each student and choosing 5 students whose hearts match the well shuffled spade cards is a valid way of choosing a random sample of 5 students from a class of 13, because the choosing each student is equally likely.
By drawing a card from a well shuffled 13 cards of heart suit and lining them in an increasing order(ace to king) and then picking the middle 5 students is a valid way of choosing a random sample of 5 students from a class of 13, because the choosing each student is equally likely.
By arranging the students according to the alphabetical order of their names and picking the student if the coin shows the head is an invalid way of choosing a random sample of 5 students from a class of 13, because the students late in the alphabet are less likely to be chosen.
Hence, option D is correct.
Chapter 10 Solutions
PRECALCULUS:GRAPHICAL,...-NASTA ED.
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