Question: State college is evaluating a new English composition course for freshmen. A random sample for n=25 is obtained and the students are placed in the course during the first semester. One year later a writing sample is obtained for each student and the writing samples are graded using a standardized evaluation technique. The average score for the sample is M=76. For the general population of college students, writing scores form a normal distribution with a mean of u=70.

1. If the writing scores have a standard deviation of \(\sigma \) =20, does the sample provide enough evidence to conclude that the new composition course has a significant effect?
   Assume a two tailed test with a=.05.
2. If the population standard deviation is \(\sigma \) =10, is the sample sufficient to demonstrate a significant effect? Again, assume a two tailed test with a=.05.
3. Briefly explain why you reached different conclusions for a&b.

Price: $2.99

Solution: The downloadable solution consists of 2 pages
Deliverable: Word Document