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STATS EXAM 1 QUESTIONS WITH COMPLETE SOLUTIONS GRADED A+
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STATS EXAM 1 QUESTIONS WITH COMPLETE SOLUTIONS GRADED A+
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STATS EXAM 1 QUESTIONS WITH COMPLETE SOLUTIONS GRADED A+Suppose that someone sampled 100 Palm trees of the same species, all planted at the same time. They recorded the height for each tree. What shape would you expect the histogram of this data to be?
A. Symmetric
B. Right Skewed
C. Left Skewed
D. Uniform Answer- A. (Symmetric)
A marketing researcher is testing out new names for a hair product. She asks 40 women to pick the name of the product that they would be most likely to buy out of a list of 4 names. Could she use a dotplot to describe her results?
A. yes
B. No Answer- B. (No)
If the mean is equal to the median, which of the following is true?
A. There is a mistake. The mean can not equal the median. B. The data is probably symmetric. C. The data is probably skewed. D. The data has to be bell shaped distributed. Answer- B. (The data is probably symmetric)
Suppose that you had the following data set.
100 200 250 275 300
Suppose that the value 100 was a typo, and it was suppose to be 500 instead. How would the value of the standard deviation change?
A. It would increase. B. It would decrease.
C. It would stay the same. D. Unable to be determined. Answer- A. (It would increase) Scores on an exam follow an approximately bell shaped distribution with a mean of 76.4 and a standard deviation of 6.1 points. Approximately, what percentage of the data is between 58.1 points and 94.7 points?
A. 68%
B. 95%
C. 99.7%
D. 50% Answer- C. (99.7%)
Distances from the data points to the measure of the center always add up to zero
A. Mean
B. Median
C. Mode
D. Variance Answer- A. (Mean)
The measure of center always has exactly 50% of the observations on either side
A. Mean
B. Median
C. Mode
D. Standard Deviation Answer- B. (Median)
The measure of the center represents the most common observation, or class of observations
A. Mode
B. Median
C. Mode
D. Range Answer- A. (Mode)
The measure of the spread is affected by the most outliers
A. Median
B. Mean
C. Range
D. Variance Answer- C. (Range)
Measure of spread around the mean, but units are not the same as those of data points
A. Mean
B. Median
C. Mode
D. Variance Answer- D. (Variance)
Is smaller for distributions where the points are clustered around the middle
A. Median
B. Standard Deviation
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