You don't even have to look up the definition of 'standard deviation'. You only
have to remember that 'smaller standard deviation' means 'less spread-out'.
First, let's find the mean (average). It's not supposed to change:
1/7th of (65 + 71 + 77 + 80 + 82 + 90 + 96) = 561/7 = <u>80 and 1/7</u> .
Now, just pick 7 scores that total 561 and are all bunched up.
The easiest way would be 80, 80, 80, 80, 80, 80, 81 .
But that's so easy that it feels like cheating.
Let's say <u>77, 78, 79, 80, 81, 82, and 84</u> .
Answer:
B
Step-by-step explanation:
f(x) = 2x + 3
f(x) = 2*3 + 3
f(x) = 6 + 3
f(x) = 9
Answer:
-2
Step-by-step explanation:
If x were -22, then you are dividing by -2 + 2, which equals 0. You can't divide by 0.
D n J = {7,8} (intersection)
Values that satisfy both sets.
D u J = {-1,1,4,5,7,8} (union)
All values present in both sets.
Answer:
she will cover a distance of 0.85 km.
Step-by-step explanation:
We have,
Grace swam 0.6 kilometres during her first week of training and 0.25 kilometres during her second week of training.
It is required to find total distance covered by her in all.
It can be calculated simply adding the distance covered in first and second week of training. So,
Total distance, D = 0.6 km +0.25 km = 0.85 km
Hence, she will cover a distance of 0.85 km.
