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Confidence Interval Using Fisher’s LSD

Confidence Interval Using Fisher’s LSD. Confidence interval based on  used to compute LSD. Reed Manufacturing Plant 1 versus Plant 2. LSD = 6.98. Confidence Interval = (-19.98,-6.02). Since the CI does not include 0, we reject H 0 and conclude the means are not equal.

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Confidence Interval Using Fisher’s LSD

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  1. Confidence Interval Using Fisher’s LSD • Confidence interval based on  used to compute LSD.

  2. Reed ManufacturingPlant 1 versus Plant 2 LSD = 6.98 Confidence Interval = (-19.98,-6.02) Since the CI does not include 0, we reject H0 and conclude the means are not equal.

  3. Reed ManufacturingPlant 1 versus Plant 3 LSD = 6.98 Confidence Interval = (-8.98,4.98) Since the CI does include 0, we accept H0 and conclude the means are equal.

  4. Reed ManufacturingPlant 2 versus Plant 3 LSD = 6.98 Confidence Interval = (4.02,17.98) Since the CI does not include 0, we reject H0 and conclude the means are not equal.

  5. H0 Rejection Rules Using t Test Reject H0 if p-value <a Reject H0 if t < -ta/2 or t > ta/2 Using LSD Reject H0 if > LSD Using Confidence Intervals Reject H0 if CI does not contain 0

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