1. Selected Problems and Solutions For Midterm
Soc2205 Midterm Review
Selected Problems and Solutions For Midterm

2. Problem: Healey 1st #2.2 a-e, 2nd #2.2 a-e
Tips:
Read questions carefully.
Answer exactly what is asked.
Round answers to 2 decimal places.

3. Solutions to #2.2 a - e a. 42.36% b. 0.47 c. 1.41 d. 52.84%
e males for each female

4. Problems: Healey 1st Can. #3.11, 4.9, and 2nd Can. #3.11
For both texts, compute
the mean,
the median,
the range and
the standard deviation for number of cars per 100 population

5. Solutions to 1st Can. #3.11 and 4.9, 2nd Can. #3.11
Mean = 40.25
Median = 44.5
Range = 51 – 10 = 41
Standard deviation = 12.29
Note: Md>Mean indicates a negative skew

6. Problem: Healey 1st #5.4 a-e, 2nd #4.4 a-e
Problem Information:
= 50
s = 10
Question asks: What % of area….

7. Example Detailed Solution 5.4a (4.4a)
For Xi = 40,
For Xi = 47,
Areas between scores and mean:
For Z = -1.00, Area = .3413
For Z = -0.30, area = .1179
Area between scores: (.3413) - (.1179) = .2234

8. Solution #5.4 (#4.4) a - e a. Percentage = .2234 x 100 = 22.34%
b %
c %
d %
e. 1.39%

9. Problem: Healey 1st #7.5a, 2nd #6.5a
Problem Information:
 = .10, Z =  1.65
= 2.3
s = .35
N = 178

10. Solution to 7.5a (6.5a)
(see next page for final answer)

11. Solution to 7.5a (6.5a) cont. CI = 2.30 ± .04 Expand this to:
“I am 90% confident that the population average is between 2.26 and 2.34 people per household”

12. Problem: Healey 1st #7.9, 2nd #6.9
Problem Information:
 = .05, Z =  1.96
Ps = (25/178) = . 14
N = 178

13. Solution to 1st #7.9, 2nd #6.9