A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly at the 422.0 gram setting. Based on a 45 bag sample where the mean is 425.0 grams, is there sufficient evidence at the 0.02 level that the bags are overfilled? Assume the standard deviation is known to be 26.0 .
Step 1 of 5 : Enter the hypotheses:
Solution :
This is the left tailed test .
The null and alternative hypothesis is ,
H0 : = 422
Ha : < 422
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