In a survey, 166 respondents say that they never use a credit card, 1223 say tha

Question

In a survey, 166 respondents say that they never use a credit card, 1223 say that they use it sometimes, and 2842 say that they use it frequently. What is the probability that a randomly selected person uses a credit card frequently? Is it unlikely for someone to use a credit card frequently? How are all of these results affected by the fact that the responses were obtained by those who decided to respond to a survey posted on the Internet? The probability that a randomly selected person uses a credit card frequently is (Round to three decimal places as needed.) Is it unlikely for someone to use a credit card frequently? O A. O B. ° C. O D. Yes, because the probability of a randomly selected person using a credit card frequently is less than or equal to 0.05. Yes, because the probability of a randomly selected person using a credit card frequently is greater than 0.05. No, because the probability of a randomly selected person using a credit card frequently is greater than 0.05. No, because the probability of a randomly selected person using a credit card frequently is less than or equal to 0.05 How are all of these results affected by the fact that the responses were obtained by those who decided to respond to a survey posted on the Internet? O A. Since this is not a voluntary response sample, valid conclusions can only be drawn about the specific group of people who chose to participate O B. Since this is a voluntary response sample, valid conclusions can be drawn about the entire population of credit card users O C. Since this is not a voluntary response sample, valid conclusions can be drawn about the entire population of credit card users O D. Since this is a voluntary response sample, valid conclusions can only be drawn about the specific group of people who chose to participate.

Explanation / Answer

probability that a randomely selected person uses a credit card frequenctly=2842/(166+1223+2842)

=0.6717

option C is correct

option D is correct

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