The time to complete a standardized exam is approximately normal with a mean of 70 minutes and a standard deviation of 10 minus.
Using the 68-95-99.7 rule, what percentage of students will complete the exam in under an hour?
1 answer:
Answer:
Step-by-step explanation:
Given that the time to complete a standardized exam is approximately normal with a mean of 70 minutes and a standard deviation of 10 minutes.
P(completing exam before 1 hour)
= P(less than an hour) = P(X<60)
=P(Z<
)
=0.5-0.34=0.16
i.e. 16% of students completed the standardized exam.
You might be interested in
3x-16y-z+9
i know this is right!
hope this helps!
31 × 26 = 806
18 × 38 = 684
806 + 684 = 1490
Answer:
90 deg
Step-by-step explanation:
Recall that for a rhombus, the diagonals always intersect at right angles.
Hence angle PXM is 90 deg
Answer:
39 liters
Step-by-step explanation:
6.5×6=39
so 39 litres
Answer:
y = 5x-1
Step-by-step explanation:
parallel lines have the same slope.
y intercept: -1
slope: 5
- 1 is the same as +-1
so, y = 5x-1
