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State |Number of crimes Per 10,000...

State |Number of crimes Per 10,000 pop | Police Protection Expenditures

per capita (dollars), per 10,000 pop.

ME 2875 122.5

NH 2282 141.8

VT 2819 102.8

MA 3262 218.7

RIXXXXX3389 193.6

NY 3279 292.4

NJ 3400 236.6

PA 3114 171.2

OH 3997 179.4

IA 3766 124.5

IL 4515 224.4

Study the variability of crimes committed and police expenditures in twelve states in 1999. Please see the data above.

1. Calculate the mean for each variable.

2. Calculate the standard deviation for each variable

3. Calculate the interquartile range for each variable.

4. Considering each distribution separately, compare the mean with the standard deviation and the IQR. Does there appear to be more variability in the number of crimes or in police expenditure per capita? Which states contribute most to this variability? What variables do you think might account for this variability?

per capita (dollars), per 10,000 pop.

ME 2875 122.5

NH 2282 141.8

VT 2819 102.8

MA 3262 218.7

RIXXXXX3389 193.6

NY 3279 292.4

NJ 3400 236.6

PA 3114 171.2

OH 3997 179.4

IA 3766 124.5

IL 4515 224.4

Study the variability of crimes committed and police expenditures in twelve states in 1999. Please see the data above.

1. Calculate the mean for each variable.

2. Calculate the standard deviation for each variable

3. Calculate the interquartile range for each variable.

4. Considering each distribution separately, compare the mean with the standard deviation and the IQR. Does there appear to be more variability in the number of crimes or in police expenditure per capita? Which states contribute most to this variability? What variables do you think might account for this variability?

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