Math ch 1

• Nominal level of measurement:


  Applies to data that consist of names labels or categories there are no and play criteria by which the data can be ordered from smallest to largest
• Ordinal level of measurement


  Applies to data that can be arranged in order however the differences between data values either cannot be determined or are meaningless
• Interval level of measurement


  Applies to data that can be arranged in order. in addition differences between data values are meaningful and cant be divided or multiplied
• Ratio level of measurement


  Applies to data that can be arranged in order. in addition both differences between data values and ratios of data values are meaningful. data at the racial level have a true zero and they can be divided and multiplied
• The senators name is Sam Wilson

  Nominal level
• The senator is 58 years old

  Ratio level. Age has a meaningful zero
• the years in which the senator was elected to the senate or 2000 2006 and 2012

  Interval level. data can be ordered and the difference between dates has meaning
• The senators total taxable income last year was 878,314

  ratio level it makes sense to say that the senators income is 10 times that of someone earning 87,000
• The senator surveyed his constitutions regarding his proposed water protection bill. the choices for response were strongly support, support, neutral, against, or strongly against

  Ordinal level. the choices can be ordered but there is no meaningful numerical difference
• The senators marital status is married

  Nominal level
• A leading news magazine claims that the senator is ranked seventh for his voting record on bills regarding public education

  Ordinal level. ranks can be ordered but differences between ranks May vary in meaning
• parameter


  A numerical measure that describes an aspect of population
• Random sample


  One in which every member of the population has an equal chance of being selected