stat10010lab3.pdf

# Table 1 below provides details on each of the

• Lab Report
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Table 1 below provides details on each of the variables stored in the date set. Familiarise yourself with the different variables: what type is each variable? Are there any missing values? Q1: The location variable is a categorical variable, but is it ordinal or nominal?

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Table 1: Explanation of the variables in the Cartoons.mtw worksheet. Variable Name Description Colour 0 = Black and white 1 = Colour Education 0 = Non-medical 1 = Medical 2 = Undergraduate student Location 1 = Hospital A 2 = Hospital B 3 = Hospital C 4 = Penn State student Otis OTIS score Cartoon1 Cartoon test score (immediately after viewing) Real1 Realistic test score (immediately after viewing) Cartoon2 Cartoon test score (4 weeks later) Real2 Realistic test score (4 weeks later) 3. Constructing a stem-and-leaf diagram. The Otis scores give a rough measure of each participant's natural ability. `Drawing’ this variable would give us a clear picture of the spread of abilities in our group of 179 participants. Let’s draw a stem-and-leaf diagram to illustrate these data. On the menu bar, go to Graph -> Stem-and-Leaf… Put the Otis variable in the Graph variables box and click ok. A stem-and-leaf diagram should appear in the Session window, similar to that shown below.
Q2: How many stem values are in your stem and leaf diagram? In its stem-and-leaf diagram Minitab also returns the counts associated with each stem on the left of each stem. If the median value for the sample is included in a row, then the count for that row is enclosed in parentheses. The values for rows above and below the median are cumulative. The count for a row above the median represents the total count for that row and the rows above it. The value for a row below the median represents the total count for that row and the rows below it. Q3: From your stem-and-leaf diagram, in what interval does the median Otis score lie?

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• Fall '17
• Statistics, Statistical charts and diagrams, Categorical distribution

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