Question

1. an airline checked 7 flights into a regional airport and recorded their arrival times. what kind of graph would you use or this data? boxplot, histogram, scatterplot, dotplot?

2. true or false: the units of x and y must always match in regression analysis.

3. true or false: in linear regression it is appropriate to predict beyond the range of x

4. determine the appropriate level of measurement (nominal, ordinal, interval, ratio): salaries of college professors, a sample of spheres categorized from softest to harest, temperatures of the ocean at various depths

Answer 1

(1) Dotplot

>> Dotplots are one of the simplest statistical plots, and are suitable for small sized data sets.

(2) False

>> The units of x and y need not necessarily match in regression analysis.

(3) True

>> In linear regression, it is appropriate to predict beyond the range of x.

(4) Salaries of college professors: Ratio level.

A sample of spheres categorized from softest to harest: Ordinal level.

Temperatures of the ocean at various depths: Interval level.