A study was conducted to determine the effectiveness of helichrysum oil for allergies. 31 of the 48 subjects who were given helichrysum oil still developed symptoms of allergies after taking the oil....

A study was conducted to determine the effectiveness of helichrysum oil for allergies. 31 of the 48 subjects who were given helichrysum oil still developed symptoms of allergies after taking the oil. In a group who were given plecebos, 87 of the 108 subjects still developed symptoms of allergies. Use a 90% confidence level to test the claim that helichrysum oil has an effect on allergy symptoms.

Is this a right, left or two tailed test?

What is the P-value?

write a conclusion