Chocolates of 250 g produced in a factory were observed to have standard deviation of 2 g. A random sample of 20 chocolates showed a standard deviation of 1.5 g. What is the x2 value for the sample ?
[A] 7.2
[B] 6.0
[C] 12.0
[D] 33.3
Answer & Explanation
Answer: 7.2