(Steps Shown) A study of a college preparatory mathematics curriculum and the scores on the Early Mathematics Placement Test (EMPT) looked at a group of 138
Question: A study of a college preparatory mathematics curriculum and the scores on the Early Mathematics Placement Test (EMPT) looked at a group of 138 juniors and 40 sophomores who are enrolled in either the Algebra II or Honors Algebra II course. The investigators compared the students grade in the course (A, B, C, D or F) with their placement level from the EMPT (2-5 with 2 being the highest). Result: "Our data suggest that the current mathematics curriculum is effective for preparing students for college level mathematics." Is this an observational study or an experiment? Why? What are the explanatory and response variables? What might be some lurking variables?
Deliverable: Word Document 
![[See Solution] Create three probability models for](/images/solutions/MC-solution-library-47965.jpg "[See Solution] Create three probability models for this event.")
[See Solution] Create three probability models for this event.
![[Solution Library] If the mean score for](/images/solutions/MC-solution-library-47966.jpg "[Solution Library] If the mean score for the students taking the EMPT")
[Solution Library] If the mean score for the students taking the EMPT
![[Step-by-Step] At the end of every course](/images/solutions/MC-solution-library-47967.jpg "[Step-by-Step] At the end of every course in the LEAD program students")
[Step-by-Step] At the end of every course in the LEAD program students
(See Steps) A school has 180 freshmen, 136 sophomores, 150 juniors,
Solution: The following two questions were asked in a survey
Cramer's Rule for Solving Linear Systems of Equations - Mathcracker.com