A certain brand produces milk with boxes in a weight of 95 gr. The average weight of 12 samples equals 96.51 gr. Assume that the distribution of the weight of the product is 1.24. Conduct a test about...

A certain brand produces milk with boxes in a weight of 95 gr. The average weight of 12 samples equals 96.51 gr.
Assume that the distribution of the weight of the product is 1.24. Conduct a test about the standart weight of the milk boxes. Does the product still weight 95gr or higher? Write down the z value which you should use for comparison.(Use at least 2 digits after decimal,sensitivity ;0.00)