A factory making wooden spacer blocks is producing parts for a customer. The agreed upon dimension and tolerance is 0.750 ± 0.010.
Of the 1000 wooden blocks in this order, a random sample of 10 blocks is pulled out to be measured. The values are as follows.
0.756 0.748
0.746 0.750
0.752 0.752
0.748 0.753
0.754 0.761
How many of these sample values are "out of tolerance"? (Just choose a numerical answer... no typing necessary).