Check your solutions from the practice.  Please be sure you fully understand all solutions before taking your exam.

 

 

 

1.      a. The type of study is observational with the variable of interest being the age of the student.

 

2.        (41.1,  50.9)

 

3.      a.  36 movies

b.  29 movies

c.  7 movies

d.  About 230 minutes

4.      Part a: Median 139,500   Mean: 163,125

Part b: Outlier 34,000  Median:  140,000 Mean: 181,571.429

Part c: outlier  434,000 Median:  139,000 Mean:  124428.57

 

5.      a. The goal is to determine how many teachers would choose a different career if given the opportunity.

b. All US teachers.

c. A Percentage of teachers who would choose a different career.

d. The 2150 teachers who were questioned.

e. Raw data is teacher responses (yes no) to question if they would choose a different career.

f.  60% of teachers who said they would choose a different career.

g. 55%-65%

 

6.      Red: (0.85,0.97)

Yellow: (0.86, 0.98)

Blue: (0.86,0.94)