A Random Sample of 64 SAT Scores of Students Applying

Multiple Choice

A random sample of 64 SAT scores of students applying for merit scholarships showed an average of 1400 with a standard deviation of 240.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.