Given: Null Hypothesis Is That the Population Mean Is 16

Given: null hypothesis is that the population mean is 16.9 against the alternative hypothesis that the population mean is not equal to 6.9. A random sample of 25 items results in a sample mean of 17.8
And the sample standard deviation is 2.4. It can be assumed that the population is normally distributed. Determine the observed "t" value.

A) t = 1.88
B) t = 1.83
C) t = 1.75
D) t = 2.21
E) None of these statements are true