Question

A fertilizer machine is set to give 12kg of nitrate for every quintal bag of fertilizer. ten 1oo kg bags are examined the percentage of nitrate are 11,14,13,12 13,12,13,14,11,1 solve it

Answer 1

Answer:

Step-by-step explanation:

Missing point in question :-  Is there any reason to believe that the machine is  defective?

If the probability of bags ≠ 12 kg is >  5% , then there is every reason to believe that the machine is  defective.

Out of 10 samples:-  11, 14, 13, 12, 13, 12, 13, 14, 11, 1​ only 2 , 12 kg bags are seen in sample. So probability of  bags ≠ 12 kg =  80%

Now, the sample size was only 10 bags out of 100. So the probability when extended to 100 bags become = 1/10 x 80% = 8%

Since 8%  >  5% , then there is every reason to believe that the machine is  defective