# Violent Crime Rates In 2020 Comparing

Violent Crime Rates In 2020 Comparing

1. Make a Grouped frequency table for both data sets (you pick the number of
groups– remember the rules about group freq. tables). The tables need to have the following: class limits, class midpoints, class
boundaries, frequency, cumulative frequency, and relative frequency.

2. Construct these following graphs:

a. Frequency
histogram.

b. Stem
and leaf plot

c. Boxplot

3.(part
of points from 1 and 2) What is the shape of the graphs (all three graphs from
number 2)?

4.(30
pts) Calculate:

I. Mean

II. Median

III. Mode

IV. Modal
class

V. Sample
variance

VI. Sample
standard deviation

VII. Range

VIII. Coefficient
of variation

IX. Min

X. Max

XI. Quartile
1

XII. Quartile
3

XIII. IQR

XIV. Skewness

XV. Kurtosis

5. (part
of 4) What is the shape based on S and K?
What measure of center and spread best describe them?

6. Construct a 90, 95, and a 99% confidence interval for each data set. What does each of these mean? Remember you do not know sigma, so what type
of interval should you use.

7. Test all 3 hypothesis for your data. This mean you are performing a 2-sample
test. Remember the steps for this type
of test. You decide what you are
claiming. Test your hypo at all three
levels.(.01, .05, .1) Remember you don’t
know sigma, so what type of hypo test should you do first, without this part,
this section will not be graded.

A.
H0:
μ1 ≤ μ2

Ha: μ1 > μ2

B.
H0:
μ1 ≥ μ2

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