The expected number of individuals with income between $50,000 and $100,000 and a credit score less than 650 is ________.   Multiple Choice   23.5   26.0   31.0

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Suppose Bank of America would like to investigate if the credit score and income level of an individual are independent of one another. Bank of America selected a random sample of 400 adults and asked them to report their credit score range and their income range. The following contingency table presents these results.

  Credit Score
Class Less than 650 650–750 More than 750
Income < $50,000 30 24 27
$50,000 ≤ Income < $100,000 42 47 38
$100,000 ≤ Income < $150,000 49 35 26
Income ≥ $150,000 27 29 26


The expected number of individuals with income between $50,000 and $100,000 and a credit score less than 650 is ________.

 

Multiple Choice
  •  

    23.5

  •  

    26.0

  •  

    31.0

  •  

    47.0

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