A principal wonders if her 5th graders score differently on a national math test than 5th graders in the U.S. at large. She gets a random sample of 20 5th graders from her school. She knows that 5th graders in the U.S. at large have a mean of 88 on the test. This is a two-tailed test.

Here are the scores of her sample of 20 5th graders: 75, 92, 85, 66, 93, 88, 75, 90, 90, 92, 84, 88, 67, 98, 99, 100, 79, 95, 88, 89

meanof the sample of 20 5^th graders: 86.65

meanof 5^th graders nationally (population):88

t stat from the test above: -0.61813

Critical t two-tail from t-table for 19 df =

The stat t is (-0.61813)

p value (Sig.) from above =0.543828

Decision:So, is the test significant?