"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 144 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 = 43 with a standard deviation = 7. The sample of n = 144 participants had a mean score of M = 42. Calculate the z-observed value that would result from this hypothesis test (Be sure to round your answer to the second decimal place). "

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A: Given that: Population mean, μ=5 Population standard deviation, σ=1.3 Sample mean, x¯=5.6 Sample…

Q: Location is known to affect the number, of a particular item, sold by Walmart. Two different…

A: given data x¯1  =  39s1 = 9n1 = 9x¯2  = 51s2 = 6n2 = 13α = 0.05claim : μ1 < μ2

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A: sample size(n)=56Mean(x)=3.94standard deviation(s)=3.43confidence level=90%

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.