Directions:
– Read the questions carefully and answer them to the best of your ability. You may write your answers on this sheet or on the sheet you do your work on, but PLEASE show your work!
Show your work!
· Evaluate manually and write/type it on the quiz document, or
· Provide scan/image of work done on calculator, or
· Insert chart/graphic if using software
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1. Evaluate .0/msohtmlclip1/01/clip_image002.gif”> (probability of success in a Bernoulli trial) for the following values:
n = 10 x = 2 p = 0.6
Answer: P(2) = ___________________________
2. 3. The following full IQ scores were obtained by testing a group of children who live near a lead smelter and are exposed to high concentrations of lead in the environment:
82
93
85
75
85
80
101
89
80
94
88
104
88
83
104
96
76
80
79
75
2. Complete the following frequency table:
IQ Interval
Frequency
Relative Frequency
67.5 72.5
72.5 77.5
77.5 82.5
82.5 87.5
87.5 92.5
92.5 97.5
97.5 102.5
102.5 107.5
107.5 112.5
3. Using the UNGROUPED sample data, find the mean; median; and mode(s), if any:
Answers: Mean ______________ Median _________________ Mode ___________
4. 5. A social psychologist gave a survey to 8 active members of a small political action group about how many hours they put into the group’s activities each week. The results were as follows: 41, 24, 44, 33, 40, 41, 19, and 30.
4. Compute the sample mean, median, and mode
Answers: Mean ______________ Median _________________ Mode ___________
5. Compute the sample variance and sample standard deviation.
Answers: Variance ___________________ Standard Deviation __________________
6. 7. A study of blood cholesterol levels using samples from 80 participants provided the following data:
Blood Cholesterol Level (mg/dl)(Interval)
Frequency
149.5 169.5
4
169.5 189.5
11
189.5 209.5
15
209.5 229.5
25
229.5 249.5
13
249.5 269.5
7
269.5 289.5
3
289.5 309.5
2
6. Compute the mean and median:
Answers: Mean ______________ Median _________________
7. Compute sample standard deviation.
Answer: Standard Deviation __________________________
8. Identify the graphics presented below (enter letter of choice which best describes graph type):
.0/msohtmlclip1/01/clip_image004.gif”>.0/msohtmlclip1/01/clip_image006.gif”> .0/msohtmlclip1/01/clip_image008.gif”>
_________ __________ __________
Choices: a. broken line graph c. double bar graph e. ogive b. histogram d. divided bar graph f. pie graph
9. One of the initial clinical trials of the anti-math anxiety drug SHOVITALL tested for the presence of headaches as a side effect. In the trial, 450 subjects were treated with 80mg of the drug, and 2.2% of the subjects developed headaches. In the binomial distribution of these 450 subjects, what are the mean and standard deviation? Use p = 0.022
Answers: Mean = _______________ Standard Deviation = _________________
10. Multiple Choice: According to the American Chemical Society, there is a 0.9 probability that in the United States, a single randomly selected $1 dollar bill is tainted with traces of cocaine. Assume eight $1 dollar bills are randomly selected. What is the probability that six (6) or more of the $1 dollar bills randomly selected will be tainted with traces of cocaine?
A. P(? 6) = 0.962 C. P(? 6) = 0.149
B. P(? 6) = 0.750 D. P(? 6) = 0.813
Answer: _________________________