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Practice Examination 1 - Elementary Statistics | Math 115, Exams of Statistics

The University of Mississippi (Ole Miss)Statistics
Prof. Jon-Michael Wimberly

Material Type: Exam; Professor: Wimberly; Class: Elementary Statistics; Subject: Mathematics; University: University of Mississippi Main Campus; Term: Fall 2011;

Typology: Exams

2010/2011

Uploaded on 11/15/2011

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Name: ___________________________________ Date: ______________
1. A researcher is studying the increase in property value for homes in Oxford. What type of
data is this (property value)?
A) Qualitative
B) Quantitative
2. A researcher is studying annual revenue generated from Yellowstone National Park. He
collects the values each year for the past decade. What type of study is this?
A) Cross-section
B) Time-series
3. A researcher is studying the number of students Statistics classes at Ole Miss. This is an
example of what type of quantitative data?
A) Continuous
B) Discrete
4. A researcher is studying the height of students enrolled at Ole Miss. This is an example of
what type of data?
A) Continuous
B) Discrete
5. An observation is a:
A) graph observed for a data set
B) value of a variable for a single element
C) table prepared for a data set
D) sample observed from the population
6. A histogram (or distribution) that is skewed to the left has:
A) a longer tail on the right side
B) a longer tail on the left side
C) shorter tails on both sides
D) the same frequency for each class
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Partial preview of the text

Download Practice Examination 1 - Elementary Statistics | Math 115 and more Exams Statistics in PDF only on Docsity!

Name: ___________________________________ Date: ______________

  1. A researcher is studying the increase in property value for homes in Oxford. What type of data is this (property value)? A) Qualitative B) Quantitative
  2. A researcher is studying annual revenue generated from Yellowstone National Park. He collects the values each year for the past decade. What type of study is this? A) Cross-section B) Time-series
  3. A researcher is studying the number of students Statistics classes at Ole Miss. This is an example of what type of quantitative data? A) Continuous B) Discrete
  4. A researcher is studying the height of students enrolled at Ole Miss. This is an example of what type of data? A) Continuous B) Discrete
  5. An observation is a: A) graph observed for a data set B) value of a variable for a single element C) table prepared for a data set D) sample observed from the population
  6. A histogram (or distribution) that is skewed to the left has: A) a longer tail on the right side B) a longer tail on the left side C) shorter tails on both sides D) the same frequency for each class
  1. A random sample is a sample drawn in such a way that: A) each member of the population has a .10 chance of being included in the sample B) all elements of a population are included C) some members of the population have no chance of being included in the sample D) each member of the population has some chance of being included in the sample
  2. When making a stem and leaf plot, for the observation 84, the stem is: A) 3 !! B) 4 C) 8 D) 11
  3. When making a stem and leaf plot, for the observation 10, the leaf is: A) 0 B) 9 C) 10- D) 1
  4. A symmetric distribution curve: A) has a longer tail on the right side B) has a longer tail on the left side C) is identical on both sides of the mean D) is triangular in shape
  5. In statistics, conducting a census means: A) making decisions based on sample results B) checking if a variable is qualitative or quantitative C) collecting information from all members of the population D) collecting a sample with replacement Use the following to answer questions 12-15. The test scores of five students are 63, 81, 79, 98, and 93.
  1. The value of is: A) 19 B) 159 C) 43 D) 173
  2. The value of is: A) 1803 B) 1950 C) 2450 D) 1785 Use the following to answer questions 18-22. The following table gives the frequency distribution of political party affilitation of 50 persons in an Algebra class. Opinion f Democrat 19 Independent 8 Republican 23
  3. The relative frequency of the Republican class rounded to two decimals is: A) 0. B) 0. C) 0. D) 0.
  4. The percentage of students who are NOT independent is: A) 23% B) 46% C) 84% D) 42%
  1. The percentage of Independent students is: A) 16% B) 8% C) 42% D) 84%
  2. The number of Republicans is: A) 19 B) 23 C) 31 D) 8
  3. The percentage of non-Democrats is: A) 62% B) 84% C) 38% D) 19% Use the following to answer questions 23-27. The following table gives the frequency distribution of test scores for a math class of 30 students. Score f 141 to 190 6 191 to 240 12 241 to 290 8 291 to 340 4
  4. The width of each class in this frequency table is: A) 141 B) 49 C) 50 D) 140

Use the following to answer questions 28-30. The following table gives the frequency distribution of the number of rooms for a sample of 100 houses. Number of Rooms f 2 15 3 9 4 16 5 25 6 13 7 8 8 14

  1. The percentage of houses that have three or fewer rooms is: A) 24 B) 9 C) 15 D) 23
  2. The percentage of houses that contain five or more rooms is: A) 25 B) 60 C) 40 D) 13
  3. The relative frequency of the fourth class, rounded to two decimal places, is: A) 0. B) 0. C) 0. D) 0.

Use the following to answer questions 31-37. The following table gives the CUMULATIVE FREQUENCY DISTRIBUTION of annual incomes (in thousands of dollars) for a sample of 200 families selected from a city. Income ($1000's) f 10 to less than 25 16 10 to less than 40 96 10 to less than 55 128 10 to less than 70 151 10 to less than 85 180 10 to less than 100 200

  1. The cumulative relative frequency of the fourth class, rounded to three decimal places, is:

A) 165.

B) 0.

C) 0.

D) 0.

  1. The sample size is: A) 771 B) 345 C) 180 D) 200
  2. The cumulative percentage for the second class, rounded to one decimal place, is: A) 48.0% B) 96.2% C) 32.1% D) 12.0%

Use the following to answer questions 38-41. A highway patrolman records the following speeds (in mph) for 25 cars that pass through his radar within a five-minute interval. Here is the histogram of that data:

  1. How many observations fall in the fourth interval? A) 0 B) 2 C) 4 D) 10
  2. What is the width of each class? A) 5 B) 10 C) 12 D) -
  3. The relative frequency of drivers whose speed is between 50 and 55 mph, rounded to two decimal places, is? A) 0. B) 0. C) 0. D) 0.
  1. The speed limit on this street is 60 mph. What percentage of drivers are traveling at or above the speed limit? A) 20% B) 25% C) 30% D) 75%
  1. In 2007/2008 basketball season, Steve Nash scored 485 field goals, 179 3-point field goals, and 222 free-throw goals. Find the pie chart that better describes the data. A) B) C)

D)

C.

  1. The number of touchdowns of a college football team is: 38 36 30 33 37 30 35 34 43 27 36 38 21 26 26 27 31 22 28 36 With frequency distribution below: Class Interval Frequency Relative Frequency 21 - 24 2 0. 25 - 28 5 0. 29 - 32 3 0. 33 - 36 6 0. 37 - 40 3 0. 41 - 44 1 0. Total 20 1. Select the bar graph that matches the data. A !!!!!!B

Answer Key - Exam 1

  1. B
  2. B
  3. B
  4. A
  5. B
  6. B
  7. D
  8. C
  9. A
  10. C
  11. C
  12. B
  13. D
  14. B
  15. C
  16. D
  17. A
  18. B
  19. C
  20. A
  21. B
  22. A
  23. C
  24. A
  25. C
  26. A
  27. C
  28. A
  29. B
  30. C
  31. B
  32. D
  33. A
  34. C
  35. A
  36. B
  37. D
  38. D
  39. A
  40. B
  41. A

42. A

43. A

44. C

45. C