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 О Но: — 2.3 Ha:ã + 2.3 Но : и — 2.8 На:и < 2.8="" ho:="" µ="" 2.3="" 2.8="" ho="" :ữ="" ha:ữ="" +="" 2.8="" ha:u="" +="" 2.3="" part="" 2="" of="" 5="" (b).="" the="" test="" statistic="" is="" 2.475="" (use="" 4="" decimal="" places)="" part="" 3="" of="" 5="" (c).="" the="" p-value="" is="" (use="" 2="" decimal="" places)="" (d).="" the="" correct="" decision="" is="" to="" reject="" the="" null="">