When a fair coin is flipped 6 times, the probability of getting an odd number of heads (1, 3, or 5) is 0.5 . What is the probability of getting an even number of heads (0, 2, 4, or 6)?
Q. 2Suppose that a 95 confidence interval for the proportion of first-year students at a school who played in intramural sports is 35 plus or minus 5. The 95 confidence interval for the proportion of students playing intramural sports is
a. 25 to 45
b. 30 to 35
c. 35 to 40
d. 30 to 40
Q. 3When two cards are drawn at random from a 52 card deck, the probability of drawing one Jack is 0.145 . The probability of drawing one Ace is 0.145, and the probability of drawing a Jack and an Ace is 0.012 . What is the probability of drawing a Jack or an Ace?
Q. 4Suppose that a 95 confidence interval for the proportion of first-year students at a school who played in intramural sports is 35 plus or minus 5. The margin of error for the confidence interval is
a. 5
b. 35
c. 95
d. None of the above
Q. 5Suppose that the probability of event A is 0.2 and the probability of event B is 0.4 . Also, suppose that the two events are independent. Then P(AB) is:
a. P(A) = 0.2
b. P(A) / P(B) = 0.2/0.4 =
c. P(A)P(B) = (0.2)(0.4) = 0.08
d. None of the above.
Q. 6Suppose that a 95 confidence interval for the proportion of first-year students at a school who played in intramural sports is 35 plus or minus 5. The confidence level for the confidence interval is
a. 5
b. 35
c. 95
d. None of the above
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