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Statistical Process Control

Quiz by Nhat-Luong Nhieu

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15 questions
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  • Q1
    What is the primary goal of Statistical Process Control?
    To maintain and improve process quality
    To increase production speed
    To reduce costs in production
    To maximize profits
    30s
  • Q2
    What is the purpose of a control chart in Statistical Process Control?
    To monitor and control the stability of a process
    To calculate process capability
    To estimate the standard deviation of a process
    To identify outliers in data
    30s
  • Q3
    Which control chart is used to monitor the mean of a process?
    X-bar chart
    P chart
    C chart
    R chart
    30s
  • Q4
    What is a common statistical tool used in Statistical Process Control?
    Control chart
    Scatter plot
    Regression analysis
    Histogram
    30s
  • Q5
    Which of the following is NOT a commonly used control chart in Statistical Process Control?
    X-bar chart
    Scatter plot
    R chart
    P chart
    30s
  • Q6
    What is a process mean in Statistical Process Control?
    The range of values in a process output
    The average value of a process output
    The highest value of a process output
    The lowest value of a process output
    30s
  • Q7
    In a Range chart, what does the range represent?
    The difference between the highest and lowest values
    The standard deviation of the data
    The mean of the data
    The median of the data
    30s
  • Q8
    What is the formula for calculating the range in a Range chart?
    Range = Mode + Variance
    Range = Median + Interquartile range
    Range = Maximum value - Minimum value
    Range = Mean + Standard deviation
    30s
  • Q9
    What is natural variation in statistical process control?
    Inspection of a process
    Intentional changes in a process
    Inherent variability within a process
    Control limits of a process
    30s
  • Q10
    What is assignable variation in statistical process control?
    Special causes of variation that can be identified and eliminated
    The variation that cannot be controlled
    The average value of a process
    The natural variation that occurs in all processes
    30s
  • Q11
    What is the formula to calculate the control limits in a p-chart?
    UCL = p̄ + 3√(p̄(1-p̄)/n), LCL = p̄ - 3√(p̄(1-p̄)/n)
    UCL = p̄ + 2√(p̄(1-p̄)/n), LCL = p̄ - 2√(p̄(1-p̄)/n)
    UCL = p̄ + 4√(p̄(1-p̄)/n), LCL = p̄ - 4√(p̄(1-p̄)/n)
    UCL = p̄ + √(p̄(1-p̄)/n), LCL = p̄ - √(p̄(1-p̄)/n)
    30s
  • Q12
    What is the purpose of the control limits in a p-chart?
    To determine if the process is statistically in control or out of control
    To set the target value for the process
    To identify the potential causes of variation
    To calculate the mean and standard deviation of the process
    30s
  • Q13
    What is the main purpose of a c-chart in statistical process control?
    To monitor the count of defects in a process
    To monitor the variance of a process
    To monitor the range of a process
    To monitor the mean of a process
    30s
  • Q14
    Which type of chart is used to monitor the proportion of defective items in a process?
    x-chart
    p-chart
    u-chart
    c-chart
    30s
  • Q15
    Which type of chart is used to monitor the count of defects in a process?
    u-chart
    p-chart
    x-chart
    c-chart
    30s

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