B-STATS EXAM 1 – Chapter 1

29 October 2023
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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
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Nominal scale
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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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nominal
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Temperature is an example of a variable that uses:
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the interval scale of measurement
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Arithmetic operations are inappropriate for:
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the nominal scales of measurement.
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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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Arithmetic operations are appropriate for:
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the interval/ratio scales of measurement.
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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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Quantitative 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:
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elements or observations
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Qualitative data are labels used to identify:
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attributes or characteristics of the data`
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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:
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categorical and uses the ordinal scale of measurement.
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Income is an example of:
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quantitative data that uses the ratio scale of measurement
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Define the 4 types of data sets:
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1. cross 2. sectional 3. time 4. series
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Statistical studies in which researchers control variables of interest are:
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experimental studies
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Statistical inference is the process of drawing conclusions about the:
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population from a set
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A portion of the population selected to represent the population 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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parameter
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Since a sample is a subset of the population, the sample mean is ____________ than the population mean.
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(β‰₯)/(>)
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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
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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, temperature, income.
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N, N, I , R
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The height of a building, measured in feet, is an example of a variable that uses:
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the ratio scale of measurement
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Census refers to data collected for:
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Entire population