Respuesta :

eseelearning

Answer:

mean = 22

Step-by-step explanation:

34 = mean + 2sd

4 = mean - 3sd ==> mean = 4 + 3sd

34 = 4 + 3sd + 2sd

30 = 5sd

sd = 6

mean = 4 + 3*6 = 4 + 18 = 22

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