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An Electronics Retailer Believes That, at Most, 40% of Their

question 142

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An electronics retailer believes that, at most, 40% of their cell phone inventory was sold during November. The retailer surveyed 80 dealers and found that 38% of the inventory was sold. Since 38% is less than 40%, is this difference of 2 percentage points sampling error or a significant difference? Test at the 0.05 level. The computed z = -0.37.


Definitions:

Laterally Right

Describes a feature or movement that extends or shifts to the right side when observed from a specific point or reference.

Laterally Left

Moving or extending to the left side in a horizontal direction.

Spring Tide

A tide that occurs just after a new or full moon, when the difference between high and low tide is greatest due to the alignment of the Sun, Moon, and Earth.

Neap Tide

A tide with the least difference between high and low water levels, occurring when the sun and moon are at right angles to each other.

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