DATA MINING ASSESSMENT

Which of the following best defines quantitative research?

• A method that focuses on exploring phenomena in their natural settings.

• A method that uses statistical, mathematical, or computational techniques.

• A method that involves interviews and focus groups.

• A method focused on subjective data analysis.

What is the first stage of the quantitative research process?

• Data collection

• Hypothesis formulation

• Literature review

• Identifying the research problem

Which of the following is an example of a descriptive statistic?

• Pearson’s correlation coefficient

• Standard deviation

• T-test

• ANOVA

What does a research proposal typically include?

• Conclusions

• Recommendations

• Methodology

• Data Analysis

Which sampling technique ensures that every member of the population has an equal chance of being selected?

• Stratified sampling

• Convenience sampling

• Random sampling

• Snowball sampling

Which of the following is a linear data structure?

• Tree

• Graph

• Stack

• Heap

The time complexity of an algorithm is expressed in terms of:

• The amount of memory used

• The number of statements executed

• The number of operations performed

• The input size

What is the time complexity to insert an element at the end of an array (with sufficient space)?

• O(1)

• O(n)

• O(log n)

• O(n log n)

Which of the following is true about a doubly linked list?

• It has nodes with only one pointer field

• It allows traversal in both directions

• It can only be used to implement stacks

• It does not allow random access

Which of the following operations is not applicable to a stack?

• Push

• Pop

• Enqueue

• Peek