Quiz on Introduction to Statistics and Data Analysis

Which type of uncertainty is primarily due to inherent variability in a manufacturing process?

• Epistemic Uncertainty

• Aleatory Uncertainty

In quality control, what does a high level of epistemic uncertainty indicate?

• Insufficient knowledge about the process

• Random variations in the process

What is a common method to reduce aleatory uncertainty in manufacturing?

• Improving process consistency

• Enhancing data analysis techniques

The dimensional variation of a product in a state-of-the-art manufacturing process corresponds to

• Aleatory Uncertainty

• Epistemic Uncertainty

Answer explanation

Since the process is using the most advanced equipment and machineries, further reduction of the variation in dimension is not possible. So, the variation corresponds to natural variation; hence, aleatory uncertainty.

“Both measures of central tendency and measures of variability are inferential statistics”- this statement is:

• True

• False

Answer explanation

Both are from descriptive statistics.

“Inferential statistics refer to the application of probability theories in estimating population characteristics on the basis of data obtained from sample”- this statement is:

• True

• False

Which of the following is not a measure of variability?

• Range

• Variance

• Mode

• Standard Variation

Which of the following is not a measure of central tendency?

• Mean

• Standard deviation

• Median

• None of the above

Tom’s test scores in math are 92, 96, 90, 85, and 82. What is the difference between Tom’s median score and the average (arithmetic mean) of her scores?

• -1

• 0

• 1

• 2

Answer explanation

The average of the set {–1, 3, 0, –2, 4, 2, x, y} is 3 and (x – y) = 2. What is the value of y?

• 8

• 9

• 10

• 11

Answer explanation