![ChaseRussell24](/avatars/3361.jpg)
ChaseRussell24
06.12.2019 •
Mathematics
For each student in a certain class, a teacher adjusted the student's test score using the formula y = 0.8x + 20, where x is the student's original test score and y is the student's adjusted test score. if the standard deviation of the original test scores of the students in the class was 20, what was the standard deviation of the adjusted test scores of the students in the class? a. 12 b. 16 c. 28 d. 36 e. 40
Solved
Show answers
More tips
- G Goods and services Stock center - a modern way of optimizing logistics...
- F Food and Cooking How to Properly Wash a Down Jacket? Tips from Experts...
- C Computers and Internet Thin Client: What It Is and Why You Need It?...
- F Food and Cooking The Most Delicious and Simple Fish in Batter Recipe...
- F Food and Cooking Red Caviar: How to Choose the Best?...
- C Computers and Internet Clearing Cache: How to Speed Up Your Browser...
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- F Food and Cooking Everything You Need to Know About Pasta...
Answers on questions: Mathematics
- M Mathematics You drop a penny from a height of 16 feet. After how many seconds does the penny land on the ground? Show FULL work....
- M Mathematics The radius of trees., Find the circumference to the nearest tenth....
- M Mathematics Put 0.25x=0.1+0.2y in standard form...
- M Mathematics Are these numbers linear or nonlinear? Time (h) 1, 2, 3, and 4 Distance (mi) 65, 130, 195, and 260...
- S Social Studies How have the characteristics of members of congress change over time?...
- M Mathematics Triangle abc is shown below. 2x 3x-7 b 4x - 10 what is the measure of bc? 14 18 7 9...
Ответ:
Option B) 16
Step-by-step explanation:
We are given the following in the question:
where x is the student's original test score and y is the student's adjusted test score.
We have to find the standard deviation of the adjusted test scores of the students in the class, if the standard deviation of the original test scores of the students in the class was 20.
We know that:
Adding a constant to each value in a data set does not change the value of the standard deviation.Multiplying each value in a data set by a constant also multiplies the standard deviation by that constant.Thus, if we add 20 to each data set then, the standard deviation does not change.
But multiplying each score by 0.8, changes the standard deviation 0.8 times.
Thus, we can write:
Thus, standard deviation of adjusted score is 16.
Ответ:
ask Google
Step-by-step explanation:
fr idk
hehe
tehe