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Expected counts in chi-squared tests with two-way tables

AP.STATS: VAR‑8 (EU), VAR‑8.H (LO), VAR‑8.H.1 (EK)
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Problem

Rashad is a hotel manager. He surveyed a random sample of 120 guests and asked them which floor their room was and about their level of satisfaction. Here are the results:
Hotel floorSatisfiedNeutralNot satisfiedTotal
1-32011839
4-62413643
7-9start box, 23, end box10538
Total673419120
Rashad wants to perform a \chi, squared test of independence between floor and satisfaction.
What is the expected count for the cell corresponding to satisfied guests that stayed in floors 7 to 9?
You may round your answer to the nearest hundredth.
Expected:
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
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