A psychologist studying the rate at which infants in three different countries vocalized distress obtained the scores below from each country
Which group of infants showed the highest mean rate of distress vocalization?
Country A 9, 9, 10, 13, 8, 8, 11, 11, 10, 7
Country B 15, 15, 16, 9, 14, 14, 17, 17, 16, 13
Country C 4, 6, 20, 17, 15, 21, 18, 18, 25, 2
A) Country A
B) Country B
C) Country C
D) Countries B and C were equally high.
D
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Indicate whether the statement is true or false
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