SOLUTION: What was the value of the observed t-statistic and its associated degrees of freedom? Group Statistics Cartoon Era N Mean Std. Deviation Std. Error Mean Number Screen Chang

Question 1170827: What was the value of the observed t-statistic and its associated degrees of freedom?

Group Statistics
Cartoon Era N Mean Std. Deviation Std. Error Mean
Number Screen Changes / Stimulation per minute 1990s 185 14.5270 5.27497 .38782
2000s 199 15.8241 5.49166 .38929

Independent Samples Test
Levene's Test for Equality of Variances t-test for Equality of Means
F Sig. t df Sig. (2-tailed) Mean Difference Std. Error Difference 95% Confidence Interval of the Difference
Lower Upper
Number Screen Changes / Stimulation per minute Equal variances assumed 1.865 .173 -2.357 382 .019 -1.29709 .55031 -2.37912 -.21507
Equal variances not assumed -2.360 381.587 .019 -1.29709 .54951 -2.37753 -.21666

Need help answering the question
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
The first one is t(df=381.59)=-2.36
There is a formula for degrees of freedom in this instance, but I would use n1+n2-2, and with this many degrees of freedom, it is almost the same as the formula and almost the same as z itself.
I'm unclear regarding the second part.
RELATED QUESTIONS
The table t value associated with the upper 5% of the t distribution and 12 degrees of... (answered by Boreal)

Find the critical value associated with a curve with 10 degrees of... (answered by stanbon)

Two-sample t test versus matched pairs t test. Consider the following data set. The data... (answered by math_tutor2020)

I know this does not have to do with algebra but I have no where else to turn! Just a... (answered by jim_thompson5910)

Find the critical value X^2 0.99 associated with a X^2 curve with 10 degrees of... (answered by Fombitz)

Use technology and a t-test to test the claim about the population mean at the given... (answered by Boreal)

In statistics Using the t value table How do u find the lower tail area of .05 with 50 (answered by Edwin McCravy)

Find the critical value having an area of 0.05 to its right for an F-curve with 8... (answered by stanbon)

what is the p-value for (Absolute value t) greater than 1.44 with 45 degrees of... (answered by stanbon)