christiantmatthews
christiantmatthews christiantmatthews
  • 26-05-2017
  • Mathematics
contestada

A students received a score of 50 on his history test. The test had a mean of 69 and a standard deviation of 10. Find the z score and assess whether his score is considered unusual.

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leonmoss28
leonmoss28 leonmoss28
  • 26-05-2017
i believe its 69.5 or 10 50 69
Answer Link
akem3498 akem3498
  • 14-12-2019

Answer:

-1.9 unusual

Step-by-step explanation:

z score is (x-mean)/sd so 50-69=-19

-19/10=-1.9

Answer Link

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