hypothesis testing by mean levels
posted by lubna .
hi everyone... i have this homework.. i tried to solve it... can anyone check if it's right or not, please??
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
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