Practice Questions Final Exam - Basic Statistics | MS 204, Exams of Statistics

Material Type: Exam; Professor: Case; Class: Basic Statistics; Subject: Mathematics (MS); University: Jacksonville State University; Term: Unknown 1989;

Typology: Exams

Pre 2010

Uploaded on 08/19/2009

koofers-user-len
koofers-user-len 🇺🇸

4.5

(2)

9 documents

1 / 3

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
MA 204 Statistics Practice Test 1 Chapters 1, 2, 9
1. Gallup sampled 1200 Americans and asked the question, “Do you approve of the methods
used by President Bush to fight terrorism?” Will the results be used in a descriptive way or
an inferential way? [5 points]
2. A questionnaire contained the question: “How old are you?” Would the responses to this
question yield qualitative or quantitative data? [5 points]
3. A web site for Democrats offers readers an opportunity to give their predictions for the next
candidate for President. Can the responses be considered a random sample of all American
Democrats? (Explain why or why not.) What (if any) bias might be present in this
sample? [6 points]
4. The following boxplot represents the ages of actors at the time they won an Oscar.
[6 points]
30
40
50
60
70
80
ages
Based on this graph, describe a “typical” age for an Oscar winner. Discuss central tendency
and variability.
pf3

Partial preview of the text

Download Practice Questions Final Exam - Basic Statistics | MS 204 and more Exams Statistics in PDF only on Docsity!

MA 204 Statistics Practice Test 1 Chapters 1, 2, 9

  1. Gallup sampled 1200 Americans and asked the question, “Do you approve of the methods used by President Bush to fight terrorism?” Will the results be used in a descriptive way or an inferential way? [5 points]
  2. A questionnaire contained the question: “How old are you?” Would the responses to this question yield qualitative or quantitative data? [5 points]
  3. A web site for Democrats offers readers an opportunity to give their predictions for the next candidate for President. Can the responses be considered a random sample of all American Democrats? (Explain why or why not.) What (if any) bias might be present in this sample? [6 points]
  4. The following boxplot represents the ages of actors at the time they won an Oscar. [6 points] 30 40 50 60 70 80 a g e s Based on this graph, describe a “typical” age for an Oscar winner. Discuss central tendency and variability.
  1. The following data represent the percentage of teachers who are unemployed in a given region of the United States. Stem-and-leaf of percent N = 22 Leaf Unit = 0. 1 1 7 3 2 13 5 2 66 8 3 133 (5) 3 78889 9 4 014 6 4 6899 2 5 01 a. Find the mean score and median score. Is there a “best” measure of central tendency for this data? Explain. [12 points] b. Calculate the standard deviation. [10 points] c. Verify the Empirical Rule for this data. [10 points] d. Based on the z score for a raw score of 1.5, would this value be considered an outlier? [10 points] e. Sketch a boxplot and comment on the shape of the distribution. [10 points]