Solve the problem.Any type of numerical information about a population obtained from a sample is called
A.
| a clinical study. |
B. a statistic.
C. a parameter.
D. a controlled study.
E. none of these
Answer: B
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Evaluate the validity of the chain of conditionals.Premise: If you loved me, then you would buy me a new car.Premise: If you wanted me to be happy, then you would buy me a new car.Conclusion: If you loved me, then you would want me to be happy.
A. Valid B. Invalid
Use the graph of population change per year for a metro area to answer the question. 
What is the difference of the 1998 and 1997 population changes?
A. 3797 B. 4843 C. -4843 D. -3797
Solve the problem.Determine the probability that in a class of 30 students, at least two students have the same birthday. Assume that birth rates are constant throughout the year. (Hint: First determine the probability that no two students have the same birthday and then apply the complementation rule.)
A. 0.786 B. 0.746 C. 0.706 D. 0.294
Solve the system by elimination. x - 7y = -539x - 8y = -37
A. {(2, 9)} B. {(-3, 9)} C. {(3, 8)} D. ?