A Researcher Is Interested in Testing to Determine If the Mean

question 26

Multiple Choice

A researcher is interested in testing to determine if the mean price of a casual lunch is different in the city than it is in the suburbs.The null hypothesis is that there is no difference in the population means (i.e.the difference is zero) .The alternative hypothesis is that there is a difference (i.e.the difference is not equal to zero) .He randomly selects a sample of 9 lunch tickets from the city population resulting in a mean of $14.30 and a standard deviation of $3.40.He randomly selects a sample of 14 lunch tickets from the suburban population resulting in a mean of $11.80 and a standard deviation $2.90.He is using an alpha value of .10 to conduct this test.Assuming that the populations are normally distributed, the critical t value from the table is _______.

• A)1.323
• B)1.721
• C)1.717 This is the value for 22 df (a wrong answer, but a detractor and corrected).
• D)1.321
• E)2.321

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Definitions:

Grandiose Narcissism

A form of narcissism where individuals have an inflated sense of self-importance, need for admiration, and a lack of empathy, often evident through arrogant behavior.

Vulnerable Narcissism

A type of narcissism marked by fragility, sensitivity to criticism, and deep-seated insecurity.

Avoidant Personality Disorder

A psychiatric condition characterized by a long-standing pattern of extreme shyness, feelings of inadequacy, and sensitivity to rejection.

Schizoid Personality Disorder

A condition characterized by a long-standing pattern of detachment from social relationships and a limited range of emotional expression.