STAT 200 QUIZ 1 NAME__________________________
Instructor: Xxxxx Spring 2014
INSTRUCTIONS
· The quiz is worth 100 points total.
· The quiz covers Chapters 1, 2 & 3.
· The quiz has two portions:
Multiple Choice (8 problems, 40 points). Show work/explanation as appropriate.
Short Answer (3 problems, 60 points) Show work.
· The quiz is open book and open notes. This means that you may refer to your textbook, notes, and online course materials, but you must work independently and may not consult anyone. You may take as much time as you wish, provided you turn in your quiz via WebTycho by 11:59 pm EDT on Sunday, April 6, 2014.
· With the quiz submission, please include the sentence, “I have completed this assignment myself, working independently and not consulting anyone except the instructor.”
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Sale price in thousand $ |
Frequency |
80.0 – 110.9 |
2 |
111.0 – 141.9 |
5 |
142.0 – 172.9 |
7 |
173.0 – 203.9 |
10 |
204.0 – 234.9 |
3 |
235.0 – 265.9 |
1 |
Scores |
Number of students |
40-59 |
2 |
60-75 |
4 |
76-82 |
6 |
83-94 |
15 |
95-99 |
5 |
528 505 342 348 492
346 349 643 470 482
A. 450.5
B. 459.7
C. 460.5
D. 441.7
12 4 6 8.5 12 16 17 32 53 85 99 123 140 167
A. 24.5 months
B. 58.7 months
C. 17 months
D. 32 months
9 15 78 13 16 101 19 10 14 17 102
A. 17 inches
B. 13.9 inches
C. no mode
D. 78 inches
Height (inc) |
Frequency |
70-71 |
1 |
72-73 |
6 |
74-75 |
10 |
76-77 |
12 |
78-79 |
8 |
80-81 |
6 |
82-83 |
1 |
A. 78.2 in.
B. 76.4 in.
C. 74.4 in.
D. 13.2 in.
A. 657
B. 36
C. 6307
D. 3547
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Express percents as decimals. Round dollar amounts to the nearest cent.
9. There are 31 participants in a special high-adventure camp. Following is a list of the age of the participants.
16, 18, 13, 24, 17, 17, 18, 14, 14, 16, 14, 20, 22, 21, 15
11, 13, 26, 27, 13, 16, 17, 17, 14, 19, 15, 17, 16, 19, 19, 28
a. (10 points) Prepare a frequency distribution of the participants’ ages with a class width of 2, and another with class width of 5.
b. (10 points) Construct a histogram of the participants’ age with a class width of 2 and another with a class width of 5.
10. I have a collection of 5 ancient gold coins. Their weights, in ounces, are 23.1, 18.6, 33.5, 12.4, and 27.1.
a. (5 points) What is the mean weight of my ancient gold coins?
b. (5 points) How do you consider this collection, a population or a sample? Why?
c. (10 points) What is the variance and standard deviation in weight of my coin collection?
11. Below is a summary of test score in two sections. The questions and possible maximum scores are different in these two sections. We notice that Student A4 in Section A and Student B2 in Section B have the same numerical score.
Test A |
Student |
Score |
Test B |
Student |
Score |
A1 |
70 |
B1 |
15 |
||
A2 |
42 |
B2 |
61 |
||
A3 |
53 |
B3 |
48 |
||
A4 |
61 |
B4 |
90 |
||
A5 |
22 |
B5 |
85 |
||
A6 |
87 |
B6 |
73 |
||
A7 |
59 |
B7 |
48 |
||
—– |
—— |
B8 |
39 |
a. (15 points) How do these two students stand relative to their own classes based on their z-scores?
b. (5 points) Which student performed better? Explain your answer based on z-score.