A high school guidance counselor analyzed data from a sample of 700 community colleges throughout the United States. One of his goals was to estimate the annual tuition costs of community colleges in the United States.
Describe the population and variable of interest to the guidance counselor.
Q. 2Which number could be the probability of an event that is almost certain to occur?
A) 1.01 B) .99 C) .01 D) .51
Q. 3A quality inspector tested 71 copiers in an attempt to estimate the average failure rate of the copier model. His study indicated that the number of failures decreased from two years ago, indicating an increase in the reliability of the copiers.
Describe the variable of interest to the inspector.
Q. 4Which number could be the probability of an event that rarely occurs?
A) .01 B) .51 C) -.01 D) .99
Q. 5An experiment consists of rolling two dice and summing the resulting values. Which of the following is not a sample point for this experiment?
A) 1 B) 6 C) 2 D) 7
Q. 6A bag of colored candies contains 20 red, 25 yellow, and 35 orange candies. An experiment consists of randomly choosing one candy from the bag and recording its color. What is the sample space for this experiment?
A) 80 B) 20, 25, 35
C) red, yellow, orange D) 1/4, 5/16, 7/16
Q. 7The outcome of an experiment is the number of resulting heads when a nickel and a dime are flipped simultaneously. What is the sample space for this experiment?
A) HH, HT, TH, TT B) HH, HT, TT C) nickel, dime D) 0, 1, 2
Q. 8Fill in the blank. The __________ is the collection of all the sample points in an experiment.
A) union B) Venn diagram C) event D) sample space
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