Question
46.Researchers wanting to assess skin irritation associated with a new sunscreen developed for those with photo sensitivity. They randomly sample 240 men with a history
46.Researchers wanting to assess skin irritation associated with a new sunscreen developed for those with photo sensitivity. They randomly sample 240 men with a history of photo sensitivityand 240 men without a history of photo sensitivityand ask them to apply the cream and report the level of skin irritation they experience after spending 20 minutes in the sun using a scale of 0-10. The average skin irritation score for the group with history of photo sensitivitywas 1.2 and the average skin irritation score for the group without a history of photo sensitivitywas 1.4. The Levene'stest for equality of variances had a p value of 0.04. You know this means:
a. The researchers should report the t-test results NOT assuming equal variances
b. The researchers should reject the null hypothesis and report there is a difference in the average skin irritation score
c. The researchers should report the t-test results assuming equal variances
d. The researchers should fail to reject the null hypothesis and conclude there is NOT a difference in the average skin irritation score
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