Answer:
7.737
Step-by-step explanation:
Answer:
Mean: 13
SD:
Step-by-step explanation:
To find the mean, you have to add up all of them and divide by the number of them. The sum is 30+30+18 or 78, and there are 6 so the mean is 78 / 6 = 13.
To find the standard deviation, we need to first find the distance from them to the mean. These are 2, 3, 3, 3, 5, and 2. Square these values to get 4, 9, 9, 9, 25, and 4. Now we have to take the mean of this, which is 8+27+25=35+25=60, so the mean is 10 and now we take the square root so the SD is .
Answer:
2 hours
Step-by-step explanation:
Not needed
Answer:
Step-by-step explanation:
the slope is in the equation
-6/7 is the slope
Answer:
The y-intercept is (0,0) the slope is -1/3
Step-by-step explanation:
The y-intercept is the point where the line intercepts with the y-axis. The slope is rise over run. It's equation is y2-y1/x2-x1. The points I used are (-3,1) and (3,-1). This makes -1-1/-3-3=2/6 which is equivalent to -1/3.