In a survey, 173 respondents say that they never use a credit card, 1229 say tha

Question

In a survey, 173 respondents say that they never use a credit card, 1229 say that they use it sometimes, and 2826 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. Yes, because the probability of a randomly selected person using a credit card frequently is less than or equal to 0.05. B. No, because the probability of a randomly selected person using a O C. Yes, because the probability of a randomly selected person using a O D. No, because the probability of a randomly selected person using a credit card frequently is greater than 0.05. credit card frequently is greater than 0.05. credit card frequently is less than or equal to 0.05

Explanation / Answer

Number of respondents uses credit card frequently = 2826

Total number of respondents = (173 + 1229 + 2826) = 4228

P( uses credit card frequently) = n(uses credit card frequently) / Total respondents

= 2826 / 4228

= 0.668

It is not unlikely to use credit card frequently,

No, because probability of randomly selected person using a credit card frequently is greater than 0.05.

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