NTN Data Analytics 3

Question 1

A police department's crime mapping software shows that burglaries cluster in three hotspots. What analytical technique is being used?

Accepted Answer

Spatial analysis

Answer

Regression analysis

Answer

Time series forecasting

Answer

Factor analysis

Question 2

An emergency dispatch center processes calls with the following priority levels: Priority 1 (life-threatening) averages 2 minutes handling time, Priority 2 (urgent) averages 5 minutes, and Priority 3 (non-urgent) averages 8 minutes. If daily call volume is 40% Priority 1, 35% Priority 2, and 25% Priority 3, what is the weighted average handling time per call?

Accepted Answer

4.55 minutes

Answer

5.0 minutes

Answer

3.8 minutes

Answer

5.5 minutes

Question 3

Which of the following best describes a Type I error in the context of a public safety study?

Accepted Answer

Concluding that a community policing program reduced crime when it actually had no effect

Answer

Failing to detect a real increase in crime rates

Answer

Using an inappropriate sample size

Answer

Collecting biased data from unreliable sources

Question 4

A 911 center tracked call volumes over 24 hours and found the data follows a normal distribution with a mean of 45 calls per hour and a standard deviation of 8. Approximately what percentage of hours will have between 37 and 53 calls?

Accepted Answer

68%

Answer

50%

Answer

95%

Answer

99.7%

Question 5

A department collected response time data for 200 incidents. The five-number summary is: minimum 3.1 min, Q1 5.2 min, median 6.8 min, Q3 9.4 min, maximum 22.5 min. Which value is most likely an outlier?

Accepted Answer

22.5 minutes

Answer

3.1 minutes

Answer

5.2 minutes

Answer

9.4 minutes

Question 6

A fire department wants to predict future call volumes based on population growth, average temperature, and day of the week. Which analytical method is most appropriate?

Accepted Answer

Multiple regression analysis

Answer

Simple linear regression

Answer

Chi-square test

Answer

Paired t-test