Answered

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The mean output of a certain type of amplifier is 335335 watts with a standard deviation of 1212 watts. If 7070 amplifiers are sampled, what is the probability that the mean of the sample would be greater than 338.4338.4 watts

Sagot :

Answer:

.3885 = 38.85%

Step-by-step explanation:

*Probability-Above 38.85%

Z1=0.28 Z2=-27.92

*x-1 338.4

 

*µ 335

*σ 12

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