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A principal claims that the students in his school are above average intelligence.

/in /by

A principal claims that the students in his school are above average intelligence. A random sample of thirty

students IQ scores have a mean score of 112. The mean population IQ is 100 and the standard deviation is 15. 

Null hypothesis = population mean is 100

Alternate hypothesis = students have an above average IQ score

Is there sufficient evidence to support the principal’s claim? 

 
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