Answer:
<u>=-26.7</u>
Step-by-step explanation:
=-13.9+(-12.8)
=-13.9-12.8
<u>=-26.7</u>
Answer:
0.60
1.00
Step-by-step explanation:
Y=2x-3 rise over run and then the y intercept
Step-by-step explanation:
4x-0=12
4x=12divide both sides by 4
x=3
Answer:
Standard deviation gets smaller
Step-by-step explanation:
No. of students = 45
The class had an average of 56 words per minute (WPM) with a standard deviation of 7 WPM.

The teacher realized that the data from one student who typed 55 WPM was not entered.
So, new sum = 2520+55
New sum =2575
So, new mean =
New mean =57.22
Standard deviation is the measure of distance between observation and mean
So, if number gets closer to mean , Standard deviation gets smaller . if the numbers get bigger , Standard deviation gets bigger.
Since 55 is closer to 57.22
So, Standard deviation gets smaller