Stem-and-Leaf plot is a method of organizing numerical data in order of place value. The 'ones digit' and the 'tens digit and greater' of each data item is separated as leaves and stems respectively. The stem-and-leaf plot below shows the number of students enrolled in a dance class in the past 12 years.
Vaccination with live viruses may interfere with TST reactions. For persons scheduled to receive a TST, testing should be done as follows: Either on the same day as vaccination with live-virus vaccine or 4-6 weeks after the administration of the live-virus vaccine. At least one month after smallpox vaccination.
1 Your baby may need to be tested again. 2  There is less chance of a false result if the test is done between 24 and 72 hours after birth. 3  If your baby has PKU, he or she will need regular blood tests to check phenylalanine levels. Your baby has been drinking milk for less than 24 hours. 2  Best results occur after your baby has been breast-feeding or drinking formula for 2 full days. 3  Your baby is vomiting or refusing to eat. 4  If the PKU test is done before your baby has eaten for 2 days, the results may not be correct.