BUS 308 Week 2 Quizanswers

1.
Question :
The one-sample t-test differs from the z-test in which way?
@Answer found in section 4.3 The One-sample t-Test, in Statistics for Managers

Student Answer:

There are no parameter values involved in a t-test.

The t-test is more sensitive to minor differences between sample and population.

With the t-test one can be confident of the normality of the data.

The t-test requires no <known> parameter standard error of the mean.

Points Received:
0 of 1 Comments:

Question 2.
Question :
If a certifying agency raises the requirements for real estate agents, what sort of decision error is the agency protecting against?

Student Answer:

Type I

Type II

Type III

Type IV Instructor Explanation:
Answer found in section 3.4 Statistical Significance, in Statistics for Managers

Points Received:
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Question 3.
Question :
What is the alternate hypothesis in a problem where sales group two is predicted to be “. . . significantly less productive than sales group one?”
@Answer found in sections 4.3 The One-sample t-Test and 4.4 Hypothesis Testing, in Statistics for Managers

Student Answer:

HA: μ1
≠ μ 2

HA: μ 1= μ 2

HA: μ 1> μ2

HA: μ 1< μ 2

Points Received:
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Question 4.
Question :
Which of the following defines statistical significance?

Student Answer:

The outcome is unlikely to have occurred by chance.

The outcome is important.

The outcome is unusual.

The outcome is one that can be explained by normal circumstances. Instructor Explanation:
Answer found in section 3.3 The z-test, in Statistics for Managers

Points Received:
1 of 1 Comments:

Question 5.
Question :
The standard error of the mean can be calculated by dividing μ by the square root of the number of values in the distribution.

Student Answer:

True

False Instructor Explanation:
Answer found in section 3.2 The Distribution of Sample