Suppose That 10 Grades Are Drawn from a Normal Population

question 12

Essay

Suppose that 10 grades are drawn from a normal population whose standard deviation is 15.The observations are:
90 54 78 66 48 72 66 42 60 50
At 99% confidence,you want to determine whether the mean of the population from which this sample was taken is greater than 60.
a.State the null and alternative hypotheses.
b.Compute the value of the test statistic.
c.Compute the p-value.
d.Interpret the results.

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Definitions:

Cognitive Dissonance

Feelings of discomfort resulting from holding contradictory beliefs, ideas, or values at the same time in one's mind.

Attitudes

Mental and emotional entities that inherit positive or negative evaluations of objects, people, or events, influencing an individual's behavior.

Actions

The things that an individual does, often in response to external stimuli or internal decisions.

Cognitive Dissonance

The psychological discomfort experienced by an individual who holds two or more contradictory beliefs, values, or ideas simultaneously.