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1. In a ecological study, a biologist gave predators access to three different prey items and noted which prey item was eaten first, second, and last. What type of data does this represent? a. Ordinal Data because values are used as ranks and NOT used as numerical measurements b. Nominal Data because values are used as qualitative measurements and NOT used as numerical measurements 2. A marine biologist noted the body color of randomly sampled sea stars. What type of data does this represent? a. The observations are sea star body colors (e.g. purple, orange, red) which form categories. These are categorical data. b. The observations are sea star body colors (e.g. purple, orange, red) which form categories. These are ordinal data. 3. Which of the following four examples are ONLY measures of central tendency? a. a) arithmetic mean, b) harmonic mean, c) geometric data, and d) range b. a) arithmetic mean, b) harmonic mean, c) geometric mean, and d) median 4. Three types of means were computed, an arithmetic mean, a geometric mean and a harmonic mean. What can you say about the relative size of each of these descriptive statistics? a. The arithmetic mean is always less than or equal to the geometric mean which is always less than or equal to the harmonic mean. The equality only holds if all the data values are identical. b. The arithmetic mean is always greater than or equal to the geometric mean which is always greater than or equal to the harmonic mean. The equality only holds if all the data values are identical. 5. When might we be likely to use a coefficient of variation? a. We would most likely use a coefficient of variation when we are comparing a variety of measurements that are on same scales b. We would most likely use a coefficient of variation when we are comparing a variety of measurements that are on different scales 6. A baby is born with a birth weight that is equal to the 75th percentile for newborns. What does this mean? a. The 75th percentile means that 75% of the babies weight the same or less than this baby and 25% weigh more b. The 75th percentile means that 74% of the babies weight the same or less than this baby and 25% weigh more 7. What does it mean to say that two outcomes of a trial are mutually exclusive? a. Two outcomes of a trial are mutually exclusive if they occur at the same time b. Two outcomes of a trial are mutually exclusive if they cannot occur at the same time 8. What does it mean for two events to be independent? a. When two events are independent, the outcome of the first event does not affect the probabilities of the outcomes for the second event. b. When two events are independent, the first event will have an impact on the second event.

1. In a ecological study, a biologist gave predators access to three different prey items and noted which prey item was eaten first, second, and last. What type of data does this represent?
a. Ordinal Data because values are used as ranks and NOT used as numerical measurements
b. Nominal Data because values are used as qualitative measurements and NOT used as numerical measurements
2. A marine biologist noted the body color of randomly sampled sea stars. What type of data does this represent?
a. The observations are sea star body colors (e.g. purple, orange, red) which form categories. These are categorical data.
b. The observations are sea star body colors (e.g. purple, orange, red) which form categories. These are ordinal data.
3. Which of the following four examples are ONLY measures of central tendency?
a. a) arithmetic mean, b) harmonic mean, c) geometric data, and d) range
b. a) arithmetic mean, b) harmonic mean, c) geometric mean, and d) median
4. Three types of means were computed, an arithmetic mean, a geometric mean and a harmonic mean. What can you say about the relative size of each of these descriptive statistics?
a. The arithmetic mean is always less than or equal to the geometric mean which is always less than or equal to the harmonic mean. The equality only holds if all the data values are identical.
b. The arithmetic mean is always greater than or equal to the geometric mean which is always greater than or equal to the harmonic mean. The equality only holds if all the data values are identical.
5. When might we be likely to use a coefficient of variation?
a. We would most likely use a coefficient of variation when we are comparing a variety of measurements that are on same scales
b. We would most likely use a coefficient of variation when we are comparing a variety of measurements that are on different scales
6. A baby is born with a birth weight that is equal to the 75th percentile for newborns. What does this mean?
a. The 75th percentile means that 75% of the babies weight the same or less than this baby and 25% weigh more
b. The 75th percentile means that 74% of the babies weight the same or less than this baby and 25% weigh more
7. What does it mean to say that two outcomes of a trial are mutually exclusive?
a. Two outcomes of a trial are mutually exclusive if they occur at the same time
b. Two outcomes of a trial are mutually exclusive if they cannot occur at the same time
8. What does it mean for two events to be independent?
a. When two events are independent, the outcome of the first event does not affect the probabilities of the outcomes for the second event.
b. When two events are independent, the first event will have an impact on the second event.

Added by Kimberly S.

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