A Company’s officials were concerned about the length of time a particular drug retained its potency. They suspect that drug potency decreases sooner than expected. A random sample of bottles of a product was drawn from the production line and analyzed for potency. A second sample of bottles was obtained and stored in a regulated environment for a period of 1 year. Summary statistics of the potency readings for two samples are shown below.   n Sample mean Sample sd Fresh Bottles 10 10.37 0.3234 Stored Bottles 10 9.83 0.2406   Carryout an appropriate test at a 5% significance level to see whether there is enough evidence towards the company’s suspicion. Show the p-value calculation. What assumptions you made about the data when doing the above hypothesis test. Interpret the type I and type II errors in the context of this problem.

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A Company’s officials were concerned about the length of time a particular drug retained its potency. They suspect that drug potency decreases sooner than expected. A random sample of bottles of a product was drawn from the production line and analyzed for potency. A second sample of bottles was obtained and stored in a regulated environment for a period of 1 year. Summary statistics of the potency readings for two samples are shown below.

 

n

Sample mean

Sample sd

Fresh Bottles

10

10.37

0.3234

Stored Bottles

10

9.83

0.2406

 

  1. Carryout an appropriate test at a 5% significance level to see whether there is enough evidence towards the company’s suspicion. Show the p-value calculation.
  2. What assumptions you made about the data when doing the above hypothesis test.
  3. Interpret the type I and type II errors in the context of this problem.
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