SCENARIO 9-3
an Appliance Manufacturer Claims to Have Developed a Compact

question 83

Short Answer

SCENARIO 9-3
An appliance manufacturer claims to have developed a compact microwave oven that consumes a mean of no more than 250 W.From previous studies, it is believed that power consumption for microwave ovens is normally distributed with a population standard deviation of 15 W.A consumer group has decided to try to discover if the claim appears true.They take a sample of 20 microwave ovens and find that they consume a mean of 257.3 W.
-Referring to Scenario 9-3, the appropriate hypotheses to determine if the manufacturer's claim appears reasonable are: a) $H _ { 0 } : \mu = 250$ versus $H _ { 1 } : \mu \neq 250$
b) $H _ { 0 } : \mu \geq 250$ versus $H _ { 1 } : \mu < 250$
c) $H _ { 0 } : \mu \leq 250$ versus $H _ { 1 } : \mu > 250$
d) $H _ { 0 } : \mu \geq 257.3$ versus $H _ { 1 } : \mu < 257.3$

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Definitions:

Converter-Out Temperature

The temperature of the fluid exiting a converter, often monitored in vehicles or machinery for heat management.

Planetary Gearsets

A system of gears consisting of one or more outer gears (planet gears) revolving around a central (sun) gear, commonly used in automatic transmissions for gear ratio changes.

Mechanical Modulator

A device in transmission systems that adjusts hydraulic pressure based on engine load and speed, controlling shift timing and smoothness.

Stall Test

An evaluation method in automotive diagnostics where the transmission's performance is tested under full load while the vehicle is stationary.