Students of a Large University Spend an Average of $5

question 25

Short Answer

Students of a large university spend an average of $5 a day on lunch. The standard deviation of the expenditure is $3. A simple random sample of 36 students is taken.
a.What are the expected value, standard deviation, and shape of the sampling distribution of the sample mean?
b.What is the probability that the sample mean will be at least $4?
c.What is the probability that the sample mean will be at least $5.90?

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Definitions:

Self-affirmation

is the practice of reminding oneself of personal values and beliefs to maintain self-integrity and reduce the impact of threats.

Confirm Negative Stereotype

The act of behaving in a way that supports harmful, oversimplified beliefs or ideas about a group, reinforcing existing prejudices.

Sense of Self-esteem

An individual's subjective evaluation of their own worth and capabilities.

Stereotypes Use

The application or employment of generalized beliefs or assumptions about individuals based on their membership in certain groups.