QUESTION 1
It is assumed that achievement test scores should be correlated with student's classroom
performance. One would expect that students who consistently perform well in the classroom
(tests, quizes, etc.) would also perform well on a standardized
Business
Analytics
Regression Module-6
Dummy Variables
Possible Gender Discrimination in Salary at
Fifth National Bank of Springfield
Regression Module 6
2
Dummy Variables
The Fifth National Bank of Springfield is facing
a gender-discrimination suit. The
PRACTICE EXAM 1
1. A weight loss clinic built a regression model where Y is weight loss measured in pounds; X1
= length of time in weight loss program recorded in months; X2 = 1 if morning workout
session, else zero; X3 = 1 if afternoon workout session, e
Normal (and some Binomial) Distribution Problems
In the following ND refers to the function NORMDIST(X,Mean,SD,1). NI denotes the
NORMINV(prob, Mean, SD) functions. Note that in Normal Distribution problems. < and >
are equivalent to <= and >=, respective
Binomial Distribution Problems
Let X denote the Binomial random variable. In all of the following problems, BD denotes the
BINOMDIST function in Excel whose syntax is BD(k, n, p, 0 or 1). If the last argument is 1
that means X=k successes. If the last arg
Quiz 2
1. The time it takes you to swim 100 yards in a race is Normal(62
seconds; 2 seconds). In your next five races, what is the chance
that you will swim under a minute at least twice?
2. A large retailer has purchased 10,000 high quality videotapes. T
Quiz 1
1. A computer chip component is designed so that they are replaced after 5 years. A
historical study of 10,000 parts over a 10-year period shows that the time before first
repair is Normally distributed with mean 36 months and the standard deviatio
QUIZ 3
1. Correlation is a summary measure that indicates:
a. a curved relationship among the variables
b. the rate of change in Y for a one unit change in X
c. the strength of the linear relationship between pairs of variables
d. the magnitude of differe
QUIZ 5
1. The stock returns for ABC Corporation is normally distributed with mean= .05 and SD= .
03. What is the chance of incurring a loss on this stock?
2. The personnel department of a large company requires every prospective employee to
take an execut
QUIZ 4
1. A physical fitness association is including the mile run in its secondary school fitness test
for boys. The time for this event for boys is known to be normally distributed with mean
450 seconds and standard deviation 50 seconds. The fitness ass