A Researcher Is Interested in Testing to Determine If the Mean

question 76

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 and that the population variances are approximately equal, the degrees of freedom for this problem are _______.

• A)23
• B)22
• C)21
• D)1
• E)2

---

Definitions:

Coaching

is a developmental process where an experienced individual, known as a coach, supports a learner or client in achieving a specific personal or professional goal through guidance and encouragement.

Job Adjustment

The process by which individuals adapt to their work environment, often involving changes in role, responsibilities, or attitude towards the job.

Developing

The process of growth, progress, or improvement in skills, knowledge, or capabilities.

Job Adjustment

The process of adapting or accommodating to the requirements and conditions of a specific job or workplace environment.