Coefficient of variation is the ratio of the standard deviation to the mean (average)
Coefficient of variation = (standard deviation/mean) × 100
×
=
Answer:
The t distribution is used, because we have the standard deviation for the sample.
Step-by-step explanation:
When to use the z or the t distribution?
When we have the standard deviation for the population, we use the z distribution.
When we have the standard deviation for the sample, we use the t distribution.
In this question:
We have the standard deviation for the sample, which means that the t distribution is used.
Answer:
1. 34 students.
2. 6 is the median height.
3. 10 have 171cm 4 have 190cm.
4. 2 students have no taller than 171cm.
Step-by-step explanation:
I really can't explain it because it hard to explain how i answered your question.
Answer:
3 x 10d = a
d=days
a=ants
Step-by-step explanation:
Answer:
9
Step-by-step explanation:
just trust me, i did this stuff in like 2 grade