02.08.2022 - 05:13

# The minimum injection pressure (psi) for injection molding specimens of high armylose corn was determined for eight different specimens (higher pressure corresponds to greater processing difficulty),

Question:

The minimum injection pressure (psi) for injection molding specimens of high armylose corn was determined for eight different specimens (higher pressure corresponds to greater processing difficulty), resulting in the following observations.

14.7 12.9 17.9 14.1 12.3 16.4 9.1 8.0

(a) Determine the values of the sample mean {eq}bar x {/eq}, sample median {eq}bar x {/eq}, and {eq}12.5 % {/eq} trimmed mean {eq}bar x_{tr} {/eq}.

(b) Compare these values.

A. The median is much larger than the mean and trimmed mean, indicating negative skewness.

B. The mean is much larger than the mean and trimmed mean, indicating positive skewness.

C. The median is much larger than the mean and trimmed mean, indicating positive skewness.

D. The mean is much larger than the mean and trimmed mean, indicating negative skewness.

E. All three measures of center are similar, indicating little skewness to the data set.

(c) By how much could the smallest sample observation, currently 8.0, be increased without affecting the value of the sample median?