Penicillin is produced through a fermentation process Investigators want to comp

Question

Penicillin is produced through a fermentation process Investigators want to compare the yield from two different production methods They will be testing across several days and each day they start a new fermentation process Under what situations might the investigators want to consider blocking on the day'? For the testing difference between the two production methods how many numerator degrees of freedom would there be for the F test? For testing the day (block) effect, the investigators found a p-value of p = 0.093 What can they conclude? There is a statistically significant association of block with production yield There is no association of block and production yield Unable to claim a statistically significant association between Mock and production yield Blocking had no statistically significant association with production method Penicillin is produced through a fermentation process. want to compare the yield from two different production methods. They will be testing across several days and each day they start a. process Under what situations might the investigators want to consider on day'?

Explanation / Answer

Question 1:

If there is lot of variation on the fermentation process across the seven days Monday-Sunday, it would be useful to consider the analysis by adjusting for the influence by the day factor using the blocking technique.

Question 2:

For testing the difference between the two production methods, the numerator df for the F-test would be the number of observations in sample 1 minus one.

Question 3: At 10% level of significance, the option (a) is correct one.

Question 4: Including the interaction term would help in deciding whether the fermentation process depends on the week-days as well as the two production methods.

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