B.Stats, Chapter 1, Practice Problems
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A survey to collect data on the entire population is a ___.
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Census
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In a questionnaire, respondents are asked to mark their gender as male or female. The scale of measurement for Gender is the ___ scale.
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nominal
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The scale of measurement that is used to rank the order of the observations for a variable is called:
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ordinal
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The ordinal scale of measurement has the properties of:
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rank only
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Temperature is an example of a variable that uses the ___ scale of measurement.
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interval
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Arrhythmic operations are inappropriate for the ___ scales of measurement.
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nominal, ordinal
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Data obtained from a nominal scale can be either:
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numeric or non-numeric
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Data can be either:
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categorical or quantitative
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All the data collected in a particular study are referred to as the ___.
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sample
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Quantitive data are always ___.
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numeric
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The number of cases will always be the same as the number of ___ or ___.
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elements or observations
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Qualitative data are labels used to identify ___ or ___ of the data.
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attributes or characteristics
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Social security numbers consist of numeric values: Therefore, social security is an example of: ___.
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nominal scale
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For ease of data entry into a university database, 1 denotes that the student is an undergraduate and 2 indicates that the student is a graduate student. In this case data are ___ and uses the ___ scale of measurement.
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categorical and ordinal
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Income is an example of ___ data that uses the ___ scale of measurement.
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quantitive / ratio
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Define the 4 types of data:
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1. cross sectional 2. time series 3. pooled cross-sectional 4. pannel
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Statistical studies in which researchers control variables of interest are ___ studies.
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experimental
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Statistical interference is the process of drawing conclusions about the ___ from a ___.
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conclusions / sample
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A portion of the population selected to represent the populations is called a ___.
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sample
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In a sample of 400 students in a university, 80 or 20&, are Business majors. Based on the above information, the school's paper reported that "20% of all the students at the university are Business majors." This report is an example of ___.
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statistical inference
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A statistics professor asked students in a class their ages. On the basis of this information, the professor states that the average age of all the students in the university is 24 years. This is an example of ___.
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statistical inference
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The Department of Transportation of a city has noted that on the average there are 17 accidents per day. The average number of accidents is an example of ___.
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apromital / perameter
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Since a sample is a subset of the population, the sample mean is always ___ than the population mean.
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none of these
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In a data set, the number of elements will always be the same as the number of ____.
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observations - elements = observations
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Name the four scales of measurement.
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1. nominal 2. ordinal 3. interval 4. ratio
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Name the scale of measurement for each of the following variables: gender, social security number, tempter, income.
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gender=nominal social security = nominal temperature = interval Income = Ratio
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The height of a building, measured in feet, is an example of a variable that uses the ___ scale of measurement.
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Ration
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Census refers to data collected for:
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entire population
