A mail-order company classifies its customers by gender (male/female) and by location of residence (urban/suburban). The market research department has determined that 2/3 of their customers are female and that 75 of their customers live in the suburbs. They have also determined that gender and location of residence seem to be independent of one another. The mail order company will randomly select one of their customers. Suppose we know they have selected a person in the suburbs. What is the probability that this person is female?
Q. 2The multiplier for a confidence interval is determined by
a. the desired level of confidence and the sample size.
b. the desired level of confidence but not the sample size.
c. the sample size but not the desired level of confidence.
d. neither the sample size nor the level of confidence.
Q. 3A mail-order company classifies its customers by gender (male/female) and by location of residence (urban/suburban). The market research department has determined that 2/3 of their customers are female and that 75 of their customers live in the suburbs. They have also determined that gender and location of residence seem to be independent of one another. f the mail order company will randomly select one of their customers, what is the probability that it will be a suburban female?
Q. 4If the sample size is increased but the sample proportion remains the same, which of the following must also be increased?
a. sample estimate
b. multiplier
c. standard error
d. none of the elements would be increased
Q. 5When a fair coin is flipped 6 times, the probability of getting an odd number of heads (1, 3, or 5) is 0.5 . The probability of getting more than 3 heads is 0.344, and the probability of getting 5 heads is 0.094 . What is the probability of getting either an odd number of heads or more than 3 heads?
Q. 6If the confidence level is increased, which of the following must also be increased?
a. sample estimate
b. multiplier
c. standard error
d. none of the elements would be increased
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