The minimum injection pressure (psi) for injection molding specimens of high amy

Question

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

Compare these values.(choose one)

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

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

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

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

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

(b) By how much could the smallest sample observation, currently 8.2, be increased without affecting the value of the sample median?
______ psi

Explanation / Answer

a. Mean = 12.48, Median = 12.5, trim mean = 12.29

2. The median is much larger than the mean and treammed mean , indicating negative skewness.

b.the median lies between 12 and 13 , so if we incresed the lowest sample value upto 12, then median will be unaffected. Therefore we can increased (12-8.2) = 3.8 , so that median will be unaffected.

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