Question

1.) Suppose you want to compare distributions of college student scores across 25 classes. Which display would be the most appropriate?

a. Bar Charts

b. Box Plots

c. Histograms

d. Pie charts

2.) If you find your data set is highly skewed, which of the following measure of central tendency is the most resistant to skewness and is the most appropriate measure?

a. Mean

b. Median

c. Mode

3.) Normal model describes fuel economy (MPG) for automobiles and a Toyota Prius has a standardized (z-score) of +3.3. This means that Prius:

a. Average 3.3 miles per gallon.

b. Get 3.3 miles per gallon more than the average car

c. Have standardized deviation of 3.3 miles per gallon

d. Mile per gallon is 3.3 standard deviation higher than the average car

4.) If a sample has a variance of 120, what is the standard deviation?

S = ________

Answer 1

Solution

1) option d

Pie charts

Pie charts are best to compare parts of a whole, they are used to compare things between different groups.

2) option b median

3) d. Mile per gallon is 3.3 standard deviation higher than the average car

4) s = 10.9545