Final Examination - Assessment Activity - Week5 - QNT/351 - eCampus

When a class interval is expressed as 100 up to 200, _________________________.

• The class interval is 99

• Observations with values of 200 are excluded from the class

• Observations with values of 100 are excluded from the class

• Observations with values of 200 are included in the class

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Final Examination - Assessment Activity - Week5 - QNT/351 - eCampus

The distribution of a sample of the outside diameters of PVC pipes approximates a symmetrical, bell-shaped distribution. The arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. About 68% of the outside diameters lie between what two amounts?

• 13.8 and 14.2 inches

• 13.9 and 14.1 inches

• 13.0 and 15.0 inches

• 13.5 and 14.5 inches