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August 21, 2014

August 21, 2014

Posted by **lubna** on Wednesday, November 10, 2010 at 4:22am.

Question:

The maximum acceptable level of a certain toxic chemical in vegetables has been set at 0.2 parts per million (ppm). A consumer health group measured the level of the chemical in a random sample of tomatoes obtained from one producer to determine whether the mean level of the chemical in these tomatoes exceeds the recommended limit.

Answers:

A. H0: ¦Ì < 0.2 ppm

Ha: ¦Ì > 0.2 ppm

B. H0: ¦Ì > 0.2 ppm

Ha: ¦Ì = 0.2 ppm

C. H0: ¦Ì = 0.2 ppm

Ha: ¦Ì > 0.2 ppm

D. H0: ¦Ì = 0.2 ppm

Ha: ¦Ì ¡Ý 0.2 ppm

--==--

I assumed that Ho is true

so mainly Ho: ¦Ì = 0.2 ppm

and since the consumer health group are trying to determine the mean level of the chemicals in tomatoes if they exceeds the max limit, So, i'll assume also Ha: ¦Ì > 0.2 ppm

and therefore the correct answer would be C

is that correct?? please reply to me ASAP.. Thank you

- hypothesis testing by mean levels -
**lubna**, Wednesday, November 10, 2010 at 4:23am¦Ì = mu

- hypothesis testing by mean levels -
**PsyDAG**, Wednesday, November 10, 2010 at 9:37amYou are right. However, if you have a Mac, you can type mu (µ) by using option + m keys. There should be something similar with a PC.

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