In the manufacture of soft contact lenses, the power (the strength) of the lens needs to be very close to the target value In the paper An ANOM Type Test for Variances from Normal Populations Technometrics (1997) 39 274283 , a comparison of several suppliers is made shy relative to the consistency ...

In the manufacture of soft contact lenses, the power (the strength) of the lens needs to be

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In the manufacture of soft contact lenses, the power (the strength) of the lens needs to be very close to the target value. In the paper €œAn ANOM-Type Test for Variances from Normal Populations€™€™ [Technometrics (1997) 39: 274€“283], a comparison of several suppliers is made relative to the consistency of the power of the lens. The following table contains the deviations from the target power value of lenses produced using materials from three different suppliers:

a. Compute the mean and standard deviation for the deviations of each supplier.
b. Plot the sample deviation data.
c. Describe the deviation from specified power for the three suppliers.
d. Which supplier appears to provide material that produces lenses having power closest to the target value?

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a The means and standard deviations are given below Supplier y s 1 18923 296 2 ...View the full answer

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Question Posted: Nov 21, 2015 01:11 AM

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In the manufacture of soft contact lenses, the power (the strength) of the lens needs to be

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Supplier Deviations from Target Power Value 189.9 1919 190.9 183.8 185.5 190.9 1928 1884 189.0 2 156.6 1584 157.7 154.1 152.3 1615 158.1 150.9 156.9 2 3 218.6 208.4 187.1 199.5 202.0 2111 197.6 204.4 206.8

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a The means and standard deviations are given below Supplier y s 1 18923 296 2 ...View the full answer

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