Posted by Angie on Wednesday, November 14, 2012 at 7:36pm.
First period: 85, 83, 74, 70, 88,95,89,72,90,83,77,91,98,89,82,84
Second period: 95,89,82,81,72,69,100,97,75,91,82,79,96,81,80,95,89,97,83,71
Mark is a student in the first period class. His score on the exam was 95%. Zoe is a student in the second period class, she also received a score of 95%. Are the two scores equivalent in relation to the scores in their respective classes?
A)suppose two students one from each class scored a 72 on the exam. What conclusion can you draw from this?
B)suppose a student had a score of 88 in 1st period class, and in 2nd period a student scored an 89, What conclusion can you draw after examining each students score?

Math  PsyDAG, Thursday, November 15, 2012 at 12:52pm
The answer to the first question is yes.
For A and B, do the following for each period:
Find the mean first = sum of scores/number of scores
Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.
Standard deviation = square root of variance
Z = (scoremean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.
I'll let you do the calculations.
Answer This Question
Related Questions
 math  Mr. Smithâ€™s first period class had an average of 90% on the first test, ...
 Math 231  In Mr. Everett's firstperiod class, 18 of 25 students passed the ...
 math  At Smart Middle School students are required to take 7 classes each ...
 8th grade  At Smart Middle School students are required to take 7 classes each ...
 algebra 1  A survey was taken of students in math classes to find out how many ...
 English  1. In the first period, I have a class. 2. At the first period, I have...
 Math  At Smart Middle School students are required to take 7 classes each ...
 algebra 1  A survey was taken of students in math classes to find out how many ...
 Algebra 1  A survey was taken of students in math classes to find out how many ...
 Physics  5. If a wave has a wavelength of 20m and a speed of 100 m/s, what is ...
More Related Questions