The Weights of Soy Patties Sold by Veggie Burgers Delight

Multiple Choice

The weights of soy patties sold by Veggie Burgers Delight are normally distributed.A random sample of 15 patties yields a mean weight of 3.8 ounces with a sample standard deviation of 0.5 ounces.At the .05 level of significance, perform a hypothesis test to see if the true mean weight is less than 4 ounces.
The correct calculated value of the test statistic is ________________________ .

A) -0.4
B) 0.4
C) -1.55
D) 1.55
E) 2.79