Practice Quiz

DSST Principles of Statistics Exam Prep - Question List

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36.

Jackson's team is choosing participants for his marketing research from a list of customers. They decide to choose every 7th name in a list of telephone numbers within the directory. What is this type of sampling referred to?

  1. stratified
  2. systematic
  3. simple random
  4. judgment
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37.

Quantitative research methods involve the measurement and analysis of data. All of the following are examples of quantitative methods EXCEPT:

  1. case study
  2. survey
  3. questionnaire
  4. experiment
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38. In regression analysis, the following assumptions are made EXCEPT:
  1. linearity
  2. homoscedasticity
  3. normality of errors
  4. dependence of errors
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39.

The given numbers are daily groundwater elevation readings from a monitoring well taken during a month experiencing snowmelt and extended rainfall events.

7.6, 7.7, 4.3, 5.9, 5.0, 10.5, 7.7, 9.5, 12.0, 12.6, 6.5, 8.3, 8.2, 13.2, 12.6, 13.6, 14.1, 13.5, 11.5, 12.0, 10.4, 10.8, 13.1, 12.5, 10.4, 13.0, 14.1, 15.1

What is the standard deviation of these groundwater elevation readings?

  1. 3.01
  2. 8.76
  3. 9.08
  4. None of the above.
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40.

Kruger's grocery chain asks customer during their Saturday shopping if they would fill out surveys. In return, they offer them in-store savings. Customers are chosen randomly and the overall sample numbers depends on customer compliance. What is this type of sampling referred to?

  1. stratified
  2. judgment
  3. cluster
  4. convenience
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