A poll of 100 randomly selected 50 year old people were asked in how m.docx
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A poll of 100 randomly selected 50 year old people were asked in how many years were they expecting to retire. The mean was found to be 7.2 years with a standard deviaich of 3.75 years. Test the claim that the mean for all 50 year old people is less than 7.5 years assuning a 0.75 significance level. .
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Multiple Choice
t -statistic
p -statistic
z -statistic
df -statistic
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