Range which a parameter that a population may be expected to fall, on the basis of measurement, with some specific confidence level or confidence coefficient.

Question

Options

• AConfidence Interval
• BFactors
• CControl Plan
• DNormal Distribution

• A
  92% (35)
• B
  5% (2)
• C
  3% (1)

Explanation

Confidence Interval (A) directly matches the definition: it's a range of values, derived from sample measurements, within which a population parameter is expected to fall at a specified probability level (e.g., 95% confidence). Factors (B) refer to variables or inputs that influence a process or experiment outcome - unrelated to probability ranges. Control Plan (C) is a quality management document outlining how to monitor and control process inputs and outputs - a planning tool, not a statistical range. Normal Distribution (D) is a bell-shaped probability distribution describing how data spreads around a mean, not a range estimate for a parameter.

Memory tip: Think "I'm confident the answer falls in this interval" - confidence + interval = the range where you're sure the true population value lives.

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