The Precision Scientific Instrument Company Manufactures Thermometers That Are Supposed

question 46

Multiple Choice

The Precision Scientific Instrument Company manufactures thermometers that are supposed to give readings of 0°C at the freezing point of water. Tests on a large sample of these
Thermometers reveal that at the freezing point of water, some give readings below 0°C
(denoted by negative numbers) and some give readings above 0°C (denoted by positive
Numbers) . Assume that the mean reading is 0°C and the standard deviation of the readings is
1.00°C. Also assume that the frequency distribution of errors closely resembles the normal
Distribution. A thermometer is randomly selected and tested. A quality control analyst wants
To examine thermometers that give readings in the bottom 4%. Find the temperature reading
That separates the bottom 4% from the others.

• A)−°1.75
• B)−°1.63
• C)−°1.48
• D)−°1.89

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