The research department of an appliance manufacturing firm has developed a solid-state switch for its blender that the research department claims will reduce appliance returns under the one-year full warranty by 3%–6%. To determine if the claim can be supported, the testing department selects a group of the blenders manufactured with the new switch and a group with the old switch and subjects them to a normal year’s worth of wear. Out of 300 blenders tested with the new switch, twelve would have been returned. Twenty-one would have been returned out of the 300 blenders with the old switch. As the manager of the appliance manufacturing process, use a statistical procedure to verify or refute the research department’s claim.
Create 8–10 slides, including a cover and a sources list, for a presentation to the director of the manufacturing plant in which you:
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