math10practice_exam1 2 - Math 10 - Exam 1 Topics Types and...

Math 10 - Exam 1 Topics
Types and Levels of data
o Categorical, Discrete or Continuous
o Nominal, Ordinal, Interval or Ratio
Descriptive Statistics
o Stem and Leaf Graph
o
Dot Plot (Interpret)
o
Grouped Data
o
Mean, Median, Mode
o Range, Variance, Standard Deviation
o
Percentiles, Quartiles
o Correlation
o
Outliers
Effect of outliers on
• You must bring a picture ID to the exam.
• You may bring 4 pages of HANDWRITTEN notes to the exam.
• Bring your probability tables (Binomial Normal, etc)
• Bring Pencil, Calculator and your notes to the exam– no sharing is allowed during the exam. No cell phone
calculators.
• Cell Phones, iPods, PDAs, and other electronic devices must be turned off and put away .
• Manage your time so you can attempt every question .

Practice Questions for Exam 1
1. 10% of American adults have Type II diabetes. A test has been developed that has a 80% chance of correctly detecting this
disease, but has a false positive rate of 15%.
a. Draw a tree diagram of all possibilities, where the first branch represents person having Type II diabetes
(positive D+ or negative D-) and the second branch represents the test (positive T+ or negative T-).
b. What percentage of American adults will TEST positive for the Type II diabetes?
c. Given an adult tests positive for the disease, what is the probability the adult actually has Type II diabetes?
2. The data shown in the scatter plot is the distance traveled and the airfare
for 12 flights on Delta Airlines:
a. Which of the following is a reasonable estimate of the correlation
coefficient? (Circle one answer)
b. What does this graph tell us about distance and airfare
c. What is the type and level of distance traveled?
Type (Circle One)
Level (Circle One)
3. You have a 70% chance of being on time to class today and a 80% chance of
being on time to class tomorrow. Assume these two days are independent
events.
a. Find the probability of being on time to class both today and tomorrow.
b. Find the probability of being on time to class at least once today or tomorrow.
4. The following data represent the daily births at a hospital for 20 days
14
26
a) Construct a stem and leaf diagram of the data b)
Calculate the interquartile range for this data set. c)
Calculate the median for this data set.
d) Without calculating , what can you say about the mean births for this Hospital.