[S-IC.1] A cereal manufacturer claims to include 18.7 ounces of cereal in each box, with a standard deviation of 0.2 ounces. A random sample of 25 boxes shows an average of 18.5 ounces. Which of the following statements is correct?

A. The claim is likely untrue, according to a z-value of −5.

B. The claim is likely untrue, according to a z-value of −1.5.

C. The claim is likely true, according to a z-value of −5.

D. The claim is likely true, according to a z-value of −1.5.

Question

[S-IC.1] A cereal manufacturer claims to include 18.7 ounces of cereal in each box, with a standard deviation of 0.2 ounces. A random sample of 25 boxes shows an average of 18.5 ounces. Which of the following statements is correct? 




 
A. The claim is likely untrue, according to a z-value of −5. 
 
 
B. The claim is likely untrue, according to a z-value of −1.5. 
 
 
C. The claim is likely true, according to a z-value of −5. 
 
 
D. The claim is likely true, according to a z-value of −1.5.