jstarrie

# jstarrie

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• jstarrie
Participant

that makes sense..

can you confirm if DF is a two tailed T-test with df (n-k-1)?

jstarrie
Participant

the first column is more appropriately named ‘coefficient estimate” as there are examples in the text and sample exams that have ‘test statistics’ referred to the calculated t-stat..like this one

what do you think?

jstarrie
Participant

jstarrie
Participant

yes i read it as ‘col 1’ is the T-stat value and ‘col 3’ is the T-critical.  i’ve seen on other questions that provide both value of test statistics and the t-critical @ 5% significance.  i think the wording is just confusing…

jstarrie
Participant

i understand this ‘if the absolute T-value is bigger than the critical T-value of reference, one must reject the null hypothesis.’

so taking the air temp example, 0.4 is not greater than 5.8… how come the answer is reject the null???  i am so confused!! please help me understand this!!  thank you!!

jstarrie
Participant

I am not entirely following.. 🙁 the rule is reject null when t > + t critical, or t < - t critical. (see the 2nd image) for example on air temp, t-critical is -5.8, and test stat is -0.4, it doesnt satisfy this reject if 't < - t critical'.... i dont understand why it rejected. pls pls help!!!

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