Engineering Data Analysis Midterm Exam

Which measure of central tendency is most affected by outliers?

• Mean

• Median

• Mode

• Range

What is the main goal of data collection?

• To create charts and graphs

• To make data manageable for analysis

• To predict future events

• To avoid sampling bias

What type of chart is most appropriate for time-series data?

• Pie chart

• Line graph

• Bar chart

• Scatter plot

Which sampling method involves dividing the population into subgroups and sampling each subgroup?

• Random sampling

• Stratified sampling

• Cluster sampling

• Systematic sampling

What does a negative skew in data distribution indicate?

• The mean is less than the median

• The mean is greater than the median

• The data is symmetrical

• The data is bimodal

Which measure of dispersion is defined as the square root of variance?

• Range

• Standard deviation

• Interquartile range

• Mean absolute deviation

What is the median of the following dataset: {2, 5, 8, 12, 14}?

• 8

• 9

• 7.5

• 6

In systematic sampling, which member is chosen from a population if the sampling interval is 5?

• Every 5th member

• The first 5 members

• Every member after 5 intervals

• The first 10 members

Which measure is used to determine how far data points deviate from the mean?

• Mode

• Median

• Standard deviation

• Quartile

Which chart type is used to display the cumulative frequency distribution?

• Histogram

• Ogive

• Pie chart

• Box plot