Question

A factory manager claims that his plantʼs smokestacks emit 350 pounds of pollution per day, on average. However, a government inspector has received complaints from surrounding residents and business and suspects that the average emissions exceed 350 pounds per day. He monitors emissions for ten days to investigate this suspicion and compute a mean emissions based on those 10 days of 360 pounds per day.

Suppose it is reasonable to treat these 10 days monitored as a simple random sample of days and that daily emissions (in pounds) at this plant follow a normal distribution with standard deviation 25 pounds per day. Compute the P-value of the appropriate hypothesis test.

• A. 0.1038

• B. 0.2076

• C. 0.3446

• D. 0.8962

• E. Not enough information to compute.

Answer 1

& M. Ho: el = 350 HA: 47350 n=10,5=300 8=25 Šefo 1.26 ZE- 3150 (nnnnnnn PCZY 1:26)=0.1038 . pavalue = 0.1038 IA. 0.1038