Which of the following statements is true regarding the width of a confidence interval for a population proportion?
A) It is narrower for 95 confidence than for 90 confidence.
B) It is wider for a sample of size 80 than for a sample of size 40.
C) It is wider for 95 confidence than for 99 confidence.
D) It is narrower when the sample proportion is 0.20 than when the sample proportion is 0.50.
Question 2
Which of the following is not an example of the relative frequency approach to probability?
A) The outcome of a game of craps based on your personal experience
B) The outcome of a game of roulette based on historical data
C) The outcome of a poker game based on the draw of one card
D) The actuarial schedule for a life insurance company
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The injector on-time is called the pulse width.
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