Basic Statistical Concepts
- Normal distribution
This histogram indicates a(n) __________. - Incorrectly plotted histogram - Precision machine - Inadequate sample - Normal distribution
- Special
Variations come in two types. One is common. What is the other variation type? - Natural - Uncommon - Factoring - Special
- Number of inspections
What is reduced because of the ability to predict nonconformities in production? - Number of parts production - Number of inspections - Number of data points - Number of SPC reports
- Range
What is the difference between the largest value and the smallest value in the data set? - Range - Mode - Factor - Span
- Frequency
What must be counted once the boundaries are determined? - Intervals - Placement - Frequency - Histogram
- Histogram
What shows how a specific feature varies in data? - Chart - Histogram - R chart - Variable Chart
- Bimodal
What type of histogram shape is used to show two distinct data sets? - Skewed - Bimodal - Chopped - Unstable
- Plotted data values that show good central tendency
A bell-shaped curve can be described by which of the following statements? - Plotted data values that show good central tendency - Plotted data values that illustrate unstable processes - Plotted data values with alternating center points - None of the above
- Unstable
A special cause variation will not create a bell curve in the data. What is said of the process if the variation is special? - Stable - Unstable - Unpredictable - Unprecedented
- Statistical Process Control
SPC stands for __________. - Standard practices and competencies - Statistical Process Control - Staffing protocols and cost - Standard part cost
- Stability
The histogram can determine important aspects of a process. What is one of the characteristics of the process that can be determined? - Structure - Experiences - Expenses - Stability
