Is this a one-tail, determine the decision for rejecting null hypothesis if reject Ho if t > __________, do we reject null or fail to reject?

A manufacturer of banana chips would like to know whether its bag filling machine works correctly at the 442 gram setting. Based on a 28 bag sample where the mean is 447 grams and the standard deviation is 21, is there sufficient evidence at the 0.05 level that the bags are overfilled? Assume the population distribution is approximately normal. Step 2 of 5: Find the value of the test statistic. Round your answer to three decimal places