The process that makes the spaghetti noodles for Delectable Delights is supposed to produce noodles with an average length of 252 mm. Allison, the Quality Control Manager, is concerned that Machine #42 is not working properly and the noodles it produces are too short. You are asked to take a random sample of 40 noodles from Machine #42 and perform a hypothesis test to determine if the noodles produced by the machine are, on average, less than 252 mm. Use a significance level of 5%.
JMP Output for Hypothesis Test:
Hypothesized Value 
252 
Actual Estimate 
250.95 
DF 
39 
Std Dev 
2.74516 
t Test 

Test Statistic 
2.4191 
Prob > t 
0.0203* 
Prob > t 
0.9898 
Prob < t 
0.0102* 
Test Statistic: 2.4191
Pvalue or Rejection Region: 0.0203
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