So we are given that the mean is 42% and the sd (standard deviation) is 8%
Assuming our data is normal we can use the 68-95-99 rule
So one thing you should realize is that 42% + 8% is 50% which is passing. That is one standard deviation higher. So we use:
100 - 68 - 13.5 - 2.35 - 0.15 = 16. That means 16% of students passed the test. Which is terrible. They probably need to hit the books more.
Anyways if you have any question feel free to message me!
Hopes this helps!
Answer:
the answer is c because if you look at the number line it is divided into 3 equal parts and b and c is before -1 but b is -2/3 and c is -1/3 so the answer is c
Answer:
D.
Step-by-step explanation:
Look for the closed circle with the arrow pointing to the right on this one.
Answer:
log(4)
Step-by-step explanation:
log(2) + log(2)
log(2×2)
log(4)
Answer:
135
Step-by-step explanation:
Well 3 friends and 45 dollars each
45*3=135
