SSPO Data Analysis and Interpretation 2

Question 1

A precinct records 48 burglaries in January and 36 in February. What is the percentage decrease from January to February?

Accepted Answer

25%

Answer

The decrease is 12 out of 48, which equals 25%.

Question 2

A bar chart shows vehicle thefts by day: Mon=10, Tue=15, Wed=8, Thu=12, Fri=20, Sat=18, Sun=6. On which day is the theft count closest to the weekly mean?

Accepted Answer

Thursday

Answer

The weekly mean is 89/7 ≈ 12.7, and Thursday's count of 12 is closest.

Question 3

Officers complete an average of 18 reports per week. If one officer completes 22 reports in a week, how many standard deviations above the mean is this, given a standard deviation of 4?

Accepted Answer

1.0

Answer

(22 − 18) / 4 = 1.0 standard deviations above the mean.

Question 4

A table shows calls-for-service: District A=320, District B=410, District C=275, District D=395. What percentage of all calls came from District B?

Accepted Answer

31.5%

Answer

Total calls = 1400; District B = 410/1400 × 100 ≈ 29.3%... wait: 410/1400 = 29.3%; correct index is 0.

Question 5

A scatter plot shows a strong negative correlation between patrol density and crime rate. What does this relationship indicate?

Accepted Answer

Higher patrol density is associated with lower crime rates

Answer

A negative correlation means as one variable increases, the other decreases — more patrols, fewer crimes.

(SSPO) Sigma Survey for Police Officers Practice Test

(SSPO) Sigma Survey for Police Officers Practice Test

SSPO Data Analysis and Interpretation 2