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What is the importance of pretesting questions and instruments?
What are risks of not doing this? Provide an example.
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QNT 561 Week 4 Individual Mystatslab Problem Set
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1. Researchers conducted a survey of a representative sample of
over 1,000 drivers. Based on how often each driver engaged in road
behaviour, a road rage score was given. The drivers were also
grouped by annual income. The data were subjected to an analysis of
variance, with the results summarized in the table.
2. Researchers surveyed a random sample of 25 employees who
were enrolled in a certain program at one of three universities. These
individuals were divided into four distinct groups, 1, 2, 3, and 4,
depending on their job situation at a previous or current firm. The
sampled employees completed a questionnaire on their ethical
perceptions of downsizing. One item asked employees to respond to
the statement, “It is unethical for a downsizing decision to be
implemented on or prior to a major holiday.” Responses were
measured using a 5-point Likert scale, where 1 = strongly agree, 2 =
agree, 3 = neutral, 4 = disagree, and 5 = strongly disagree. Data on
both the qualitative variable “Group” and the quantitaive variable
“Ethics response” are shown in the accompanying table. The
researchers’ goal was to determine if any differences exist among the
mean ethics scores for the four groups. Complete parts a through d.
3.
What conditions must n satisfy to make the x 2 test valid?
4. There has been a recent trend for sports franchises in baseball,
football, basketball, and hockey to build new stadiums and ballsparks