Only calculate results when data is present in corresponding cell

I have two sets of data in two columns I am running reports and averages on, a pretest and posttest.

A few of these sets do not have complete data.

What I want to do is exclude the results if the data is not complete for that test. Example data below has two data sets that are not complete and need to be removed from the results.

If I were to run this count I only want to be able to show completed tests for pretest:

=COUNTIF(K:K,"<=1.9")

The desired result would be 7. How could I build the formula to exclude results with missing data? I hope I am explaining this right. Thanks

PRETEST POSTTEST
1.2 2.7
1.4 2.9
1.5 3
1.7 0.9
1.9 1.6
1.9
1.9 1.9
1.9 4.5
2.2
2.3 3.5
2.3 3.9

I apologize, the table did not post right.

In the below table there are 5 tests. Only 3 complete. I want the formula to exclude the tests that are not complete. In my example, I wanted the CountIF to return a number of complete pretests in column K that were at or below 1. In this case the scenario would return 2 for completed tests and the pretests with a 1.

K | L
1 | 3
1 |
1 | 2
2 | 4
| 3

Still searching for a workaround on this. I am finding a thread on a "TRIM" function?

FDibbins, I am currently using that for another table to count the number of occurrences in a column.

=COUNTIFS(K:K,">=5",K:K,"<=6")

How would I want to modify this? In this case if Column L also has data for tests, but not all rows have data in both Columns K & L.

I only want to return a count for column K if L has data in that row.

Thanks much

Figured it out using SUMPRODUCT