Answer:
The standard deviation will remain unchanged.
Step-by-step explanation:
Given
Solving (a): The range
This is calculated as:
Where:
So:
Solving (b): The variance
First, we calculate the mean
The variance is calculated as:
So, we have:
Solving (c): The standard deviation
This is calculated as:
--- approximately
Solving (d): With the stated condition, the standard deviation will remain unchanged.
The Answer is A. Plug in the inequalities on desmos
Out of four statements, only (c) is correct
Step-by-step explanation:
Given: The mean score for a math test taken by Class A is 84, with the scores ranging from 78 to 94. The mean score for the same math test taken by Class B is 76, with the scores ranging from 68 to 88
a) Incorrect: The highest score was in Class A which is 94
b) Incorrect: The average of Class A is 84 which is higher than Class B is 76
c) Correct : The average of Class A is 84 which is higher than Class B is 76
d) Incorrect: The difference between highest and lowest scores in Class A is 16(94-78) whereas in Class B its 20(88-68)
Answer:
x=19º
x+9=28º
7x=133º
Step-by-step explanation:
x+9+x+7x=180
9x+9=180
9x=180-9
9x=171
x=19
well to get decimal notation you would just multiply that out. so if you took 1.01x10^4 and multiply it out, it would equal 10,100.