Question

question # 3
multiple choice
which of the following is the best example of anomaly detection for data collection?

a security camera records all the footage taken over the course of a day.
a website records only the visitors who visit 50 times a day.
a cash register collects data on all receivables.
a doctor collects all his patients blood pressure data in an anonymized research study.

Explanation:

Define anomaly detection

Anomaly detection identifies unusual patterns or outliers that deviate significantly from standard behavior.

Analyze the options

• Option 1: Recording all footage is continuous, standard data collection without filtering or identifying outliers.
• Option 2: Recording only visitors who visit 50 times a day filters for highly unusual, outlier behavior (anomalies) compared to typical users.
• Option 3: Collecting all receivables is standard, complete transaction logging.
• Option 4: Collecting all blood pressure data is standard, comprehensive clinical data gathering.

Connect to mastered concepts

Using the Data Analysis knowledge point, we evaluate which method specifically targets outliers. Filtering for extreme frequencies (50 visits/day) is a classic example of identifying anomalous data points.

Answer:

• A security camera records all the footage taken over the course of a day.
• A website records only the visitors who visit 50 times a day. (Correct answer)
• A cash register collects data on all receivables.
• A doctor collects all his patients' blood pressure data in an anonymized research study.