Part 2: which test-statistic, z, t, or neither? a candy factory that produces chocolate bars claims each bar weighs 50 grams, at least that is what is printed on the label. of course, there is bound to be a little variation. an inspector randomly chooses 9 bars from one day's output of 4000 bars. the average weight of the 9 bars is only 47 grams with an sd of 3 grams. the inspector wishes to test the null hypothesis that the factory is doing what it is supposed to on this day. you can assume that the weights follow the normal curve. compute the correct se (either se or se+). (give your answer to two decimal places)
compute the test statistic. (the test statistic is either t or z). round your answer to 2 decimal places.