The table below explored relationship between researcher’s age and the article database that they prefer. Use...
The table below explored relationship between researcher’s age and the article database that they prefer. Use this dataset to find the following probabilities.
|
Web of Science |
Google Scholar |
No Preference |
|
|
40 or less |
47 |
34 |
25 |
|
Over 40 |
32 |
46 |
13 |
a) What is the probability that a researcher has no preference in choosing a database given that s/he is over 40 years old?
b) Given that a researcher is 40 years old or less, what is the probability that s/he prefers Google Scholar
c) Let A be the event of selecting a researcher who is over 40 years old. Let B be the event of selecting a researcher who prefers Google Scholar. Are A and B mutually exclusive? Explain.
d) Are A and B independent? Explain
e) What is the probability that a researcher is over 40 years old or s/he prefers Web of Science or both?
f) What is the probability that a researcher is 40 or less and s/he has no preference in choice of article database?
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The table below explored relationship between
researcher’s age and the article database that they prefer. Use...
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