For numbers 5 to 7: A study was conducted to examine the effect of thermal pollution on the growth of clams. Seven random sample of clams were collected at the intake site without thermal pollution...

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Extracted text: For numbers 5 to 7: A study was conducted to examine the effect of thermal pollution on the growth of clams. Seven random sample of clams were collected at the intake site without thermal pollution while eight random sample of clams were taken from the discharge site with thermal pollution. The length of each clam (in cm) was measured. It is of interest to test whether there is a difference between the mean length of clams from the sites with and without thermal pollution. 7. If the test yielded a p-value = 0.09, we Ho. Hence, at 5% level of significance, we have evidence to say that there is a difference between the average lengths of clams from the two sites. O A. fail to reject; no sufficient O B. fail to reject; sufficient O C. reject; no sufficient O D. reject; sufficient