A Random Sample of 81 SAT Scores of Students Applying

question 20

Multiple Choice

A random sample of 81 SAT scores of students applying for merit scholarships showed an average of 1400 with a standard deviation of 300. The t value needed to develop the 95% confidence interval for the population mean SAT score is

• A) 1.96.
• B) 1.998.
• C) 1.645.
• D) 1.28.

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