Instruction 9-3 An Appliance Manufacturer Claims to Have Developed a Compact Microwave

question 129

Short Answer

Instruction 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 Instruction 9.3,the value of the test statistic is ________.

---

Definitions:

Caffeine

A stimulant found in coffee, tea, chocolate, and some medications that can enhance alertness and reduce feelings of fatigue.

Jog

A form of trotting or running at a slow or leisurely pace intended to increase physical fitness without stressing the body.

Activation-synthesis Theory

A theory that proposes dreams are created by the higher centers of the cortex to explain the activation of the brainstem during REM sleep periods.

Latent Content

The underlying meaning or symbolism of a dream or subconscious thought, as opposed to its literal content.