Question 21

QUESTION 21 "Lula-Rae Inc. claims that ingesting a concoction of lemon and lavender essential oils will significantly elevate mood in consumers. To test this, a skeptical premedical student selects a sample of 81 participants, Each participant drinks a mixture of the essential oils and then completes a mood inventory. The population score on this mood inventory has a mean = 127 with a standard deviation = 33. The sample of n = 81 participants had a mean score of M = 120. Calculate the z-observed value that would result from this hypothesis test (Be sure to round your answer to the second decimal place)." Click Save and Submit to save and submit. Click Save All Ans