Data were collected from the sale of 25 properties by a local real estate agent. The following printout concentrated on the land value variable from the sampled properties. HYPOTHESIS: MEAN X = x X = land_value SAMPLE MEAN OF X = 51,860 SAMPLE VARIANCE OF X = 273,643,254 SAMPLE SIZE OF X = 25 x = 47,417 MEAN X - x = 4443 t = 1.34293 D.F. = 24 P-VALUE = 0.1918585 P-VALUE/2 = 0.0959288 SD. ERROR = 3308.43 What assumptions are necessary for any inferences derived from this printout to be valid?
A) The sample was selected from an approximately normal population.
B) None. The Central Limit Theorem makes any assumptions unnecessary.
C) The sampled data are approximately normal.
D) The sampling distribution of the sample mean is approximately normal.
Correct Answer:
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