W13-14 Data Analysis Quiz

"Scoring" raw survey responses typically means:

• assigning numerical values to categorical answers

• creating publication-ready tables

• selecting the statistical test

• interpreting results

given the data set 5, 8, 12, 7, 10, what is the mean?

• 8.4

• 9

• 8

• 7.4

for the values 11, 15, 15, 20, 22, the median is

• 15

• 16

• 17

• 20

the range of the data set 4, 9, 2, 6, 11 is

• 9

• 7

• 6

• 4

which graph is most appropriate for visualizing the relationship between two numeric variables?

• bar chart

• scatterplot

• pie chart

• histogram

when writing up results, the discussion should

• repeat all raw data

• interpret findings in context

• ignore limitations

• present only descriptive stats

The most critical factor in selecting a statistical program is:

• its cost

• the availability of required procedures and tests

• the visual appeal of its charts

• whether it is open-source

To minimize data-entry errors when importing into your chosen program, you should:

• use clear variable names and value labels

• delete all missing cases before import

• rely solely on manual transcription

• embed analysis notes in the data file

In a research project, Grace is tasked with creating a data dictionary to help her team understand their dataset. A data dictionary is used to:

• define each variable and its coding scheme

• compute descriptive statistics

• select the appropriate sample size

• generate inferential outputs

The range of a data set is calculated as:

• the difference between the 75th and 25th percentiles

• the highest minus the lowest value

• the average deviation from the mean

• the square root of variance