Computing test value using variances unequal formula

Reference no: EM1319249

Q1) Dietician investigated whether apples washed in hot water or in cold water turned brown at dissimilar rates when exposed to air. She took 13 random apples and cut each in half. She washed one half of each apple in hot water and other half in cold water, and then put both halves out in tray. Her results (in hours until turning particular shade of brown) are in table below. At = .01, did she see dissimilarity between two treatments?

	Hot Water	Cold Water
Sample mean	5.50	4.85
Sample variance	2.60	2.00

a) No, as the test value -1.09 is inside range (-3.055, 3.055).

b) No, as the test value -0.79 is inside range (-3.055, 3.055).

c) Yes, as the test value -0.79 is inside range (-3.012, 3.012).

d) Yes, as the test value -1.09 is outside range (-3.012, 3.012).

Q2) Mauricio Cruz, a wine merchant for Cruz's Spirits Emporium, wishes to find out if the average price of imported wine is less than average price of domestic wine. Data obtained is shown in table below

	Imported wine	Domestic wine
X‾	7.03	9.78
S	2.31	3.62
N	15	16

Determine the test value? Use α = 0.05. (Use the variances unequal formula)

A) -4.53

B) -2.54

C) -2.50

D) -6.97

Reference no: EM1319249

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