res342r6nonparametricexercise - RES 342 Research and...

RES 342 Research and Evaluation II
University of Phoenix Material
Parametric and Nonparametric Data Identification Assignment
Label each of the following situations “P” if it is an example of parametric data or “NP” if it is an
example of nonparametric data.
.1 A manufacturer produces a batch of memory chips (RAM) and measures the mean-time-
between-failures (MTBF). The manufacturer then changes a manufacturing process and
produces another batch and again measures the MTBF. Did the change to the process
improve the MTBF? NP
.2 From a written survey where the respondents were asked to rate an individual on a scale of 1
to 5, one group rated an individual a 3.7, another group rated the individual a 4.3. Is the
difference statistically significant? P
A catering company is buying equipment in order to set up their own store. They have a choice of
two ovens that they can purchase for the store. The used oven is $100 less than the new
oven, but its heating calibration is off by 20 degrees. Which one is a better buy for them?