A financial executive believes that each savings account customer has, on average, two credit cards. The following
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Question:
A financial executive believes that each savings account customer has, on average, two credit cards. The following distribution represents the number of credit cards people own. Find the mean, variance, and standard deviation. Is the financial executive correct?
Number of Credit Cards X: 0 1 2 3 4
Probability P(X): 0.19 0.50 0.18 0.08 0.05
Related Book For
Elementary Statistics A step by step approach
ISBN: 978-0073386102
8th edition
Authors: Allan Bluman
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