In Performing a Hypothesis Test Where the Null Hypothesis Is

question 119

Multiple Choice

In performing a hypothesis test where the null hypothesis is that the population mean is 4.8 against the alternative hypothesis that the population mean is not equal to 4.8, a random sample of 25 items is selected.The sample mean is 4.1 and the sample standard deviation is 1.4.It can be assumed that the population is normally distributed.The observed "t" value for this problem is _______.

• A)-12.5
• B)12.5
• C)-2.5
• D)-0.7
• E)0.7

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Definitions:

Horsepower

A unit of measurement for power, particularly for engines and motors, representing the power needed to lift 550 pounds by one foot in one second.

Windings

Coils of wire that are used to create magnetic fields when electric current passes through them, found in generators, motors, and transformers.

Voltages

The potential difference in charge between two points in an electrical field, measured in volts.

Motors

Devices that convert electrical energy into mechanical energy.