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On a standardized test the standard deviation is 30 points. Sheena scores 1023. She is told that this is 1 standard deviation above the mean. What is the mean score on the test?

Question 6 options:



1053



1000



993

Respuesta :

Chlidonias

Answer:

993

Step-by-step explanation:

standard deviation ( [tex]\sigma\\[/tex]) = 30

Sheena scores = 1023 = 1 standard deviation above the mean

which can be written as;

1023 = mean ([tex]\mu[/tex]) + 1 [tex]\sigma[/tex]

1023 = [tex]\mu[/tex] + 1 [tex]\times[/tex] 30

[tex]\mu[/tex] = 1023 - 30

[tex]\mu[/tex] = 993

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