= in Ewekansige steekproef van grootte ny = 20 word geselekteer uit 'n normale populasie met gemiddelde van 85 en standa

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answerhappygod
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= in Ewekansige steekproef van grootte ny = 20 word geselekteer uit 'n normale populasie met gemiddelde van 85 en standa

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In Ewekansige Steekproef Van Grootte Ny 20 Word Geselekteer Uit N Normale Populasie Met Gemiddelde Van 85 En Standa 1
In Ewekansige Steekproef Van Grootte Ny 20 Word Geselekteer Uit N Normale Populasie Met Gemiddelde Van 85 En Standa 1 (48.47 KiB) Viewed 23 times
= in Ewekansige steekproef van grootte ny = 20 word geselekteer uit 'n normale populasie met gemiddelde van 85 en standaardafwyking van 8. 'n Tweede steekproef van grootte n2 = 20 word geselekteer uit 'n ander normale populasie met gemiddelde van 80 en standaardafwyking van 9. Laat X, en X, die twee steekproefgemiddeldes aandui. Aanvaar dat die populasies onafhanklik van mekaar is. Kies die korrekte bewering: A random sample of size na = 20 is selected from a normal population with mean of 85 and a standard deviation of 8. A second random sample of size n2 = 20 is taken from another normal population with mean 80 and standard deviation of 9. Let X, and be the two sample means. Assume that the populations are independent of each other. Choose the correct statement: = ОА. Ох, -я, = 0.922 B. EX; - X2) = -5 OC.P(5 SX-7, 55.5) = 0 (0.0.069) OD. V(X2 - 2) = 0.85 E. Geen van die alternatiewe / None of the alternatives. OF. P(4.5 SX - 72 5 5.5) = 2P(0 < < < 0.069) =
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