23 Jun No Comments Directions: Before you begin, sav
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Directions: Before you begin, save this form (FILE, SAVE AS: M8A2_Final Exam_Your First and Last Name). Read scenarios 1 – 8, and then answer questions 1—50. In order to receive full credit, you must copy and paste a screen captured image of your data output file from the statistical software that was used to compute the answer. To generate a screen capture image, press ALT + Prt Scr. Save your work frequently to your computer. Once you are ready to submit your work, click Browse My Computer and find your file. Once youve located your file click Open and, if successful, the file name will appear under the Attached files heading. Scroll to the bottom of the page, click Submit and youre done. Be sure to check your work and correct any spelling or grammatical errors before you post.
Scenario 1:
General Questions- Answer the following multiple choice questions (1-10). Type out your answer in the space provided, include both the letter and the selection.
As the length of the confidence interval for the population mean increases, the degree of confidence in the intervals actually containing the population mean_________________?
A Stay the same
B Increases
C Decreases
D Doubles
Answer: _______________
What value of a correlation coefficient indicates that there is a perfect positive relationship between the dependent variable, y, and the independent variable, x?
Answer: ___________
What value of a correlation coefficient indicates that there is no relationship between the dependent variable, y, and the independent variable, x?
Answer: ___________
For a fixed level of confidence when the sample size increases, the length of the confidence interval for a population mean will______________?
A Stay the same.
B Increase.
C Decrease.
D Doubles.
Answer: ___________
Which of the following confidence intervals will be the widest?
A 90 Percent.
B 95 Percent.
C 98 Percent.
D 80 Percent.
Answer: ___________
The probability of failing to detect an effect when one exists is known as a:
A Type II error.
B Type I error.
C Standard error.
D Standardized erro.r
Answer: ___________
Concluding that there is an effect when in reality no effect exists is known as a:
A Type II error.
B Type I error.
C Standard error.
B Type I error.
Answer: _________
As the sample size increases, how is the power of the study affected?
A It is not affected.
B It is decreased.
C It approaches zero.
D It is increased.
Answer: ___________
When a researcher decreases the risk of making a type 1 error, the risk of making a type II error is?
A Decreased.
B Not Affected.
C Increased.
D Equal to the chance of making a type I error.
Answer: ___________
The coefficient of determination
A helps establish causal relationships.
B indicates the amount of variance that two variables share.
C is the same as the correlation coefficient.
D is equivalent to standard deviation.
Answer: ___________
Scenario 2:
To determine the effectiveness of a new anti-hypothyroid drug, circulating thyroid stimulating hormone (TSH) levels were measured in 20 men (with hypothyroid levels) and compared to 20 men (with hypothyroid levels) that received current standard therapy as control. The data are summarized in the table below.
What is the null hypothesis equation for this experiment?
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