THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 23

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
From a random sample of ten students in an operations management class that uses group-learning techniques,the mean examination score was found to be 82.75 and the sample standard deviation was 3.24.For an independent random sample of eight students in another marketing research class that does not use group-learning techniques,the sample mean and standard deviation of exam scores were 75.62 and 7.27,respectively.It is assumed that the and unknown population variances are not assumed to be equal.
-Determine the number of degrees of freedom.

• A)10
• B)15
• C)20
• D)25

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Definitions:

Spurious

Lacking authenticity or validity in essence or origin; not genuine, false.

Association

A connection or cooperative link between people, organizations, or concepts.

Falls

Incidents where individuals unexpectedly come to rest on the ground or lower level, often leading to injuries, especially among older adults.

Sampling Frame

The list or database from which a sample is drawn for the purpose of conducting research or statistical analysis.