Homework Problems: Questions: 18
3.36
The Organization Development Journal (Summer 2006) reported
on the results of a survey of human resource officers (HROs) at major employers
located in a southeastern city. The focus of the study was employee behavior,
namely absenteeism, promptness to work, and turnover. The study found that 55%
of the HROs had problems with employee absenteeism; also 41% had problems with
turnover. Suppose that 22% of the HROs had problems with both absenteeism and
turnover. Use this information to find the probability that an HRO selected
from the group surveyed had problems with either employee absenteeism or
employee turnover (or both). [10 pts]
A finance journal published a study of whether the decision to invest in
the stock market is dependent on IQ. Information on a sample of 154,015 adults
living in Finland formed the database for the study. An IQ score(from a
lowscore of 1 to a high score of9) was determined for each Finnish citizen as
well as whether or not the citizen invested in the stock market. The following
table gives the number of Finnish citizens in each IQscore/investment category.
Suppose one of the 154,015 citizens is selected at random. Complete parts a
through f.
a. What is the probability that the Finnish
citizen invests in the stock market?The probability is (Round to the nearest
thousandth as needed.)
b. What is the probability that the Finnish
citizen has an IQ score of 6 or higher?The probability is (Round to the nearest
thousandth as needed.)
c. What is the probability that the Finnish citizen
invests in the stock market and has an IQ score of 6 or higher?The probability
is (Round to the nearest thousandth as needed.)
d. What is the probability that the Finnish
citizen invests in the stock market or has an IQ score of 6 or higher?The
probability is (Round to the nearest thousandth as needed.)
e. What is the probability that the Finnish
citizen does not invest in the stockmarket?The probability is (Round to the
nearest thousandth as needed.)
f. Are the events {Invest in the stock market} and {IQ score of 1} mutually exclusive?
A. Yes, they are mutually exclusive because there are no Finnish
citizens who invest in the stock market and have an IQ score of 1.
B. Yes, they are mutually exclusive because there are Finnish
citizens who invest in the stock market and have an IQ score of 1.
C. No, they are not mutually exclusive because the probability
that a Finnish citizen invests in the stock market and has an IQ score of 1 is
very small.
D. No, they are not mutually exclusive because there are Finnish citizens who invest in the stock market and have an IQ score of 1.
MATH 533 Week 2  Textbook Homework Questions
 Institution(s): Devry
 Year Published: 2021
 Digital Download: Instant

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IQ_Score 
Invest_in_Market 
No_Investment 
Totals 
1 
809 
4639 
5448 
2 
1307 
8282 
9589 
3 
2060 
9407 
11467 
4 
5232 
19430 
24662 
5 
8176 
24158 
32334 
6 
10012 
21161 
31173 
7 
6501 
11290 
17791 
8 
5050 
6706 
11756 