A company’s human resources department was interested in the average number of
years that a person works before retiring. The sample of size 11 follows:
What is the mode?
A company wants to study the effect of an employee’s length of employment on their
number of workdays absent. The company collected the following information on a
random sample of seven employees.
What is the independent variable (X)?
Two movie reviewers gave their ratings (0 to 4 stars) to seven movies released this past
month as follows:
The Wilcoxon signed-rank test of difference is to be used.
What is the test statistic?
When the special rule of addition is used, the events must be _______________.
There are eight flights from Minneapolis to St. Cloud each day. The probability that any
one flight is late is 0.10. Using the binomial probability formula, what is the probability
that none are late?
Two business major students, in two different sections of an economics class, were
comparing test scores. The following shows the sections’ mean and standard deviation.
The student in section 2 scored 75. The student’s z score would be _____.
An ANOVA showed the following comparison of four treatment means.
Which treatment means are significantly different?
Affirmative action commitments by many organizations have led to an increase in the
number of women in executive positions. Satellite Office Systems has vacancies for
two executives that it will fill from among four women and six men.
To do this, the _______ probability distribution should be applied.
The difference between the maximum and minimum values in a set of data is called the
_______.