Student's t-test

Here is your exercise. You have two sets of measurements. Calculate the averages and estimated standard deviations of both sets of data. Assume that the variances of both sets are the same. Do the averages agree at the 95 % confidence level? Your answer should be one of:

Yes. This means: We do not have enough evidence (stronger than 95%) for "no".
No, we have enough evidence (probability > 95%) for "no".

Some t-distribution calculators:
stattrek
statskingdom
planetcalc

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