Reject Value (Stats) ( )

[icystrike]

Reject Value (Stats) (URGENT)

Homework Statement

Hi PF!

I've gotten a few values from an experiment for (QA):

7233, 8064, 8202, 8277

The instruction manual told keep the coeff of variance within 2.00% and that force for to reject the value 7233.

But I'm wondering if i can use t test to see if i should reject the value?

By using t-test,

t-value
$$= \frac{7944-7233}{241.069}$$
=2.94935
<3.182 (0.05 level of significance)

Therefore i can retain the value.

Precisely which is better?

Homework Equations

The Attempt at a Solution

 

[lippyka]

It depends on the context of your experiment and what you are trying to accomplish. Generally, if you have a large sample size, then using a t-test would provide a more reliable result. However, if you only have a small sample size, then the coeff of variance may be the better option since it is more conservative and less likely to produce a false positive. In this case, since the sample size is relatively small, the coeff of variance may be the better option.