The class that graduated from a college four years ago took an average of 2.3 science courses. Since then a new curriculum requirement has been introduced. The registrar is interested in the effect...

Extracted text: The class that graduated from a college four years ago took an average of 2.3 science courses. Since then a new curriculum requirement has been introduced. The registrar is interested in the effect this requirement has had on the enrollment in science courses. A random sample of the transcripts of 25 seniors found that the mean number of science courses taken was 2.8 with a standard deviation of 1.01 . Do these results suggest that the mean number of science courses taken has changed significantly since the new requirement was introduced? Test at a = 0.05. (a). The null and alternative hypotheses are Ho: = 2.3 Ha:ữ + 2.3 Но : и 3 2.8 На: и < 2.8="" но:="" ho:ữ="" ha:ữ="" +="" 2.8="" :д="" —="" 2.3="" 2.8="" на:="" и="" +="">