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Business Stats Final: Straighterline Exam/Questions with Verified answers
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Business Stats Final: Straighterline Exam/Questions with Verified answers
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Business Stats Final: StraighterlineExam/Questions with Verified
answers
Which of the following is a qualitative variable type? - - Discrete
Continuous
Both of the above
# None of the above
- What would be an example of a quantitative variable? - - The net pay on
your paycheck
The temperature outside
Your weight
# All of the above
- What is the highest level of measurement for a variable? - - Ratio
- Your compensation has increased steadily in the last few years. At the
same time, the number of homeless people in the United States has also
increased. What is this an example of? - - Association
- A sampling technique where an item can be chosen only once from a
population is called - - Sampling without replacement.
- A sampling technique where every nth item in the population is tested is
called? - - Systematic Random Sampling
- If you increase your sample size, you.. - - Eliminate all possibility of a
sample error
Increase the likelihood of a sample error
Do not affect the likelihood of a sample error
None of the above Correct
Ans: You decrease the likelihood of sample error.
, - When selecting a sample, if you intentionally select sample items that will
give you a desired result, what would you have? - - A biased sample.
- The central limit theorem states that the sampling distribution of a sample
mean approximates - - A normal distribution.
- If you sum the difference between each observation and the mean, the
sum equals - - zero
- An outlier is a data value that is - - Much bigger or smaller than the other
observation values.
- What is the square root of the variance? - - The standard deviation
- What is a measure used to analyze the dispersion of the data? - - Range
Standard deviation
Variance
Ans: All of the above
- Which descriptive statistics can Excel compute? - - Mean and Median
- The observation value that occurs most often in the sample is called the
_____. - - The Mode
- According to the empirical rule, approximately what percent of the data is
within two standard deviations plus and minus from the mean? - - 95%
- What does a histogram display? - - Frequency Distribution
- If you are in the 90th percentile in your class, what percent of the students
are below your rank? - - 90%
- Using Pearson's coefficient of skewness, what does a value of 2.5 indicate?
- - A strong positive skew
- What is a graph that depicts data as dots called? - - A dot-plot
- What is a graph that is used to depict quartile data and has "whiskers"
called? - - A box plot
- What is a "stem and leaf" also known as? - - A stem plot
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