In: Statistics and Probability
A manufacturer of banana chips would like to know whether its bag filling machine works correctly at the 431 gram setting. It is believed that the machine is underfilling or overfilling the bags. A 31 bag sample had a mean of 425 grams with a standard deviation of 18 . Assume the population is normally distributed. A level of significance of 0.05 will be used. Specify the type of hypothesis test.