anonymous
  • anonymous
The popping times of the kernels in a certain brand of microwave popcorn are normally distributed, with a mean of 150 seconds and a standard deviation of 13 seconds. The first kernel pops 128 seconds after the microwave oven is started. What is the z-score of this kernel. round to 2 decimal places.
Mathematics
jamiebookeater
  • jamiebookeater
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Vocaloid
  • Vocaloid
z-score = (given data value - mean)/standard deviation
anonymous
  • anonymous
so (128-150)/13
Vocaloid
  • Vocaloid
yup!

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anonymous
  • anonymous
i get -1.69
anonymous
  • anonymous
ish
Vocaloid
  • Vocaloid
good!
anonymous
  • anonymous
yayy

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