Answer Happy

GreenBeam Limited claims that its compact fluorescent bulbs average no more than 3.25 mg of mercury. A sample of 40 bulbs shows a mean of 3.32 mg of mercury. (a) State the hypotheses for a right-tailed test, using GreenBeam's claim as the null hypothesis about the mean. a. Ho: M2 3.25 mg vs. Hi: u<3.25 mg b. Hou s 3.25 mg vs. Hi: 4> 3.25 mg c. Họ: A= 3.25 mg vs. H: H+ 3.25 mg (Oa Ob Ос (b) Assuming a known standard deviation of 0.13 mg, calculate the z test statistic to test the manufacturer's claim. (Round your answer to 2 decimal places.) Answer is complete and correct. Test statistic 3.41 (c) At the 5 percent level of significance (a = .05) does the sample exceed the manufacturer's claim? Yes O No (d) Find the p-value. (Round intermediate calculations to 2 decimal places. Round your answer to 4 decimal places.) Answer is complete but not entirely correct. p-value 0.9997 X