Bottles of soft drink labeled 100 mL are assumed to contain

Bottles of soft drink labeled 100 mL are assumed to contain that much or more. A researcher sampled 25 bottles and found the mean volume to be 99.6 mL with a standard deviation of 1.2 mL. He wishes to test the null hypothesis at 95% confidence. If he assumes the distribution is normal, what would his critical value be?

A. –2.064 B. –1.711 C. –1.667 D. –1.645

Solution

The Value of t with n-1 = 24 d.f is -1.711