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 thisdisease, 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 airfarefor 12 flights on Delta Airlines:a.Which of the following is a reasonable estimate of the correlationcoefficient? (Circle one answer)b.What does this graph tell us about distance and airfarec.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 ofbeing on time to class tomorrow. Assume these two days are independent events.a.Find the probability of being on time to class both today andtomorrow.b.Find the probability of being on time to class at least once today ortomorrow.4.The following data represent the daily births at a hospital for 20 days1426a) 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.
