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According to the government lending institute Sallie Mae, students graduating college in United States have an...

According to the government lending institute Sallie Mae, students graduating college in United States have an average credit card debt of $6,130 with a standard deviation of $840. A random sample of 27 graduating seniors was selected, and their average credit card debt was found to be $5,760. Does this sample provide enough evidence to challenge the findings by Sallie Mae? α = 0.05. What is the test statistic?

Group of answer choices

z = 2.29

t= -2.29

z = -2.29

t=-3.00

math   Statistics-And-Probability   
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Answer #1

n= 27 X= 5760 s = 840 7 Ho: M=6130 Hai lu #6130 t= 7-4 - 5760-6130 840 27 = - 2.29 Ans: t = -2.29 qualue = 2P(Tz (-2.29) 26 -

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