Construct a normal probability plot for the following sample erf observations on

Question

Construct a normal probability plot for the following sample erf observations on coating thickness for low-viscosity paint. 0.83 0.86 089 1.04 1.10 1.13 1.28 1.32 1.47 1.49 1.59 1.62 1.64 1.69 1.78 1.85 Determine the Z percentie associated with each sample observation.(Round your answers to two decimal places.) Choose the plot that best represents the normal probability plot for the sample of observations.Would you feel comfortable estimating population mean thickness using a method that assumed a normal population distribution?

Explanation / Answer

Descriptive Statistics: Samples

              Total
Variable   Count    Mean   StDev Variance      Sum
Samples      16 1.3488 0.3400    0.1156 21.5800

The Z- percentile is calculated by using

Z = (X - Mean)/SD = (X - 1.3488)/0.34

By using above formula for each sample, the value are

Correct Answer:Option (A)

Correct Answer: Option (A)

Samples Z - Percentiles 0.83 -1.53 0.86 -1.44 0.89 -1.35 1.04 -0.91 1.1 -0.73 1.13 -0.64 1.28 -0.2 1.32 -0.08 1.47 0.36 1.49 0.42 1.59 0.71 1.62 0.8 1.64 0.86 1.69 1 1.78 1.27 1.85 1.47

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