1. The data point that lies at the 50th percentile is also known as the a. mean b. median c. mode d. variance

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1. The data point that lies at the 50th percentile is also known as the
а.
mean
b. median
c. mode
d. variance
2. Which level of measurement deals ONLY with qualitative data?
a. Nominal
b. Ordinal
c. Interval
d. Ratio
3. The empirical rule states that, for a normal distribution, 95% of data lie within
1 standard deviation of the mean
b. 2 standard deviations of the mean
а.
c. 3 standard deviations of the mean
d. 4 standard deviations of the mean
4. A researcher wants to determine the effects of an instructional technique on learning mathematics. To this,
they administer a mathematics test, and then, after a few weeks of instruction, they administer another
mathematics test to see if there are differences from the first test. The researcher does this for both the class
receiving the new instructional technique and for a class receiving traditional instruction. This type of study
most closely describes which kind of study?
a. Observational study
b. Correlational study
c. Developmental study
d. Experimental study
5. Which of the following is a measure of variation?
а.
Mean
b. Median
c. Percentile
d. Range
Transcribed Image Text:1. The data point that lies at the 50th percentile is also known as the а. mean b. median c. mode d. variance 2. Which level of measurement deals ONLY with qualitative data? a. Nominal b. Ordinal c. Interval d. Ratio 3. The empirical rule states that, for a normal distribution, 95% of data lie within 1 standard deviation of the mean b. 2 standard deviations of the mean а. c. 3 standard deviations of the mean d. 4 standard deviations of the mean 4. A researcher wants to determine the effects of an instructional technique on learning mathematics. To this, they administer a mathematics test, and then, after a few weeks of instruction, they administer another mathematics test to see if there are differences from the first test. The researcher does this for both the class receiving the new instructional technique and for a class receiving traditional instruction. This type of study most closely describes which kind of study? a. Observational study b. Correlational study c. Developmental study d. Experimental study 5. Which of the following is a measure of variation? а. Mean b. Median c. Percentile d. Range
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