Practice Quiz

DSST Principles of Statistics Exam Prep - Question List

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41. In a jar of candy there are 127 red candies, 92 orange ones, 108 yellow ones, 77 green ones, and 13 blue candies. If a person reaches into the jar without looking and grabs one piece of candy, what is the probability of that piece being red?
  1. 25%
  2. 35%
  3. 20%
  4. 30%
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42. What are the advantages of using the Least Squares Method rather than the Compass Rule adjustment to address traverse closure errors?
  1. The least squares method results in a weighted means adjustment.
  2. The least squares method may be used to adjust any type of data to meet geometric conditions and reflect statistical considerations.
  3. Free computer software programs are readily available to solve complex equations.
  4. All of the above
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43. In linear regression, the total variation explained by the variation attributable to the relationship between X (the independent variable) and Y (the dependent variable). Unexplained variation is attributable to factors outside of X. What is this variation called?
  1. total sum of squares
  2. regression sum of squares
  3. linear sum of squares
  4. error sum of squares
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44.

Given a data set of high performing sales numbers from a population of 2000 sales people across a national company, how is a sampling error calculated?

  1. subtracting the sample statistic from the population parameter
  2. subtracting the population parameter from the sample statistic
  3. subtracting the sample mean from the data value
  4. subtracting the data value from the sample mean
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45. Jeffrey is a real estate agent who wishes to study the relationship between the selling price of a house and its size (measured in feet) in Manhattan. He develops a simple linear regression model as seen below. What is the slope of the model?
Houseprice = 95.5 + 0.25 (square feet) + 13
  1. 95.5
  2. 0.25
  3. 13
  4. 4.5
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