A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly at the 445 gram setting. It is believed that the machine is underfilling the bags. A 12 bag sample had a mean of 442 grams with a standard deviation of 20. A level of significance of 0.05 will be used. Assume the population distribution is approximately normal. State the null and alternative hypotheses.

The  null hypothesis is  

The  alternative hypothesis    (This is the original claim[ It is believed that the machine is under filling the bags] )

Step-by-step explanation:

From the question we are told that  

    The population mean is  

    The  sample size is  

    The  sample mean is  

     The  standard deviation is  

     The  level of significance is  

The  null hypothesis is  

The  alternative hypothesis    (This is the original claim )

the answer will be

step-by-step explanation: