According to LIMRA, 77 of husband-wife families with kids under 18 years old have life insurance. A random sample of six husband-wife families was selected. What is the probability that exactly four families have life insurance?
A) 0.2789
B) 0.3735
C) 0.4832
D) 0.5215
Q. 2________ provide a format to display observations that have more than one value associated with them.
A) Histograms
B) Contingency tables
C) Frequency distributions
D) Pie charts
Q. 3Which of the following is not a characteristic of a binomial experiment?
A) The experiment consists of a fixed number of trials.
B) Each trial has only two possible outcomesa success or a failure.
C) The probability of a success must exceed the probability of a failure.
D) Each trial is independent of the other trials in the experiment.
Q. 4Which of the following statements is true regarding z-scores for the normal probability distribution?
A) z-scores are negative for values of x that are less than the distribution mean.
B) z-scores are positive for values of x that are less than the distribution mean.
C) z-scores are zero for values of x that are less than the distribution mean.
D) z-scores are equal to 1.0 for values of x that are equal to the distribution mean.
Q. 5The following table shows the percentage of U.S. energy consumption according to various sources.
Source Percentage
Petroleum 37
Natural Gas 25
Coal 21
Nuclear 9
All renewable 8
Which of the following best displays this data?
A) horizontal bar chart
B) vertical bar chart
C) pie chart
D) histogram
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