Practice Quiz

DSST Principles of Statistics Exam Prep - Question List

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46. In theory, the weight of an observation is defined to be ______ to the variance (standard error squared) of the observation.
  1. Proportional
  2. Inversely proportional
  3. Equal
  4. None of the above.
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47. The following is a multiple regression model. What do the regression coefficients b1 and b2 represent?
Yi = b0 + b1X1i + b2X2i +ei
  1. slopes of independent variables
  2. slopes of dependent variables
  3. random error term
  4. graph intercept
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48.

State officials wish to study those factors that affect adherence to job rehabilitation after a job-related injury. The propose to study two particular factors: the extent of previous injury and the worker's educational level. What is this type of research design called?

  1. simple linear regression
  2. multiple regression
  3. ANOVA
  4. chi-square
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49.

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 sample variance of these groundwater elevation readings?

  1. 8.764
  2. 9.089
  3. 10.56
  4. None of the above
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50. Rogers Telemarketing provides direct marketing campaigns for small and medium sized businesses. To select populations for survey purposes, the company seeks data sources such as phone books and consumer lists. These sources are also referred to as:
  1. sampling medium
  2. sampling lists
  3. sampling frame
  4. sampling methodology
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