On a Standard IQ Test,the Standard Deviation Is 15

question 104

Multiple Choice

On a standard IQ test,the standard deviation is 15.How many random IQ scores must be obtained if we want to find the true population mean (with an allowable error of 0.5) and we want 97% confidence in the results?

• A)4,239
• B)283
• C)212
• D)131
• E)66

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