Calculate the mean number of motor vehicle theft rates

Reference no: EM131656981

Statistics for CJ Research Assignment Chapter 3 - Measure of Central Tendency

Q1. Below are the salaries of chiefs in various police departments in Texas in 2013.

Agency	Police Chief Salary
Austin PD	$198,819
San Antonio PD	$187,174
Brownsville PD	$111,205
Laredo PD	$145,018
Waco PD	$114,202
Lubbock PD	$148,691
Richardson PD	$160,608
Grand Prairie PD	$159,000
Plano PD	$158,641
Mesquite	$155,355
Amarillo	$150,588

What is the median salary and what is the mean salary for this sample?

Q2. The following table shows the rate of motor vehicle theft in 2006 (Bureau of Justice Statistics 2007):

State	Rate
Alabama	322.7
Alaska	377.4
Arizona	889.5
Arkansas	265.5
California	665.7
Colorado	437.5
Connecticut	296.4
Delaware	329.9
District of Columbia	1258.9

Calculate the mean number of motor vehicle theft rates. Is the mean a good measure of central tendency for these data? Why or why not? If you think it is not a good measure, what measure of central tendency would you use, and what is its value?

Q3. For the following set of data, calculate the mode, median, and mean: {13, 5, 4, 9, 7, 14, 4}. In addition, calculate the deviation of each score from the mean and ∑(X - X^-).

Q4. Gaarder and Belknap (2002) examined a sample of 22 girls who had been sentenced as adults. The following table shows the age of each girl at the time of her arrest:

Name	Age at time of arrest
Sandy	16
Tracy	17
Hana	17
Carrie	17
Tammy	15
Maria	17
Deidre	16
Angela	17
Jackie	16
Crystal	17
Shanda	17
Lisa	15
Amanda	17
Corrine	17
Richelle	15
Jamie	16
Toni	16
Kendra	17
Rebecca	17
Elizabeth	16
Erin	17
Alice	17

Create a simple frequency distribution for these data. Using the simple frequency distribution, find the mode, and calculate the mean.

Q5. A team of researchers studied aggression in convicts on a 1 to 5 scale where 1 is the least and 5 is the most. Calculate the mean from the frequency table below:

Aggression Score	f
5	4
4	7
3	20
2	5
1	4
	N =40

Q6. Describe the characteristics of the positively skewed distribution and negatively skewed distribution. Give two examples for each.

Attachment:- Assignment.rar

Reference no: EM131656981

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