Answer:
test statistic, z = −1.74
Step-by-step explanation:
given data
students n = 100
mean time x = 41.13 seconds
σ = 5
we consider µ = 42
solution
we get here The test statistic that is express as
test statistic, z = ......................1
put here value and we will get
test statistic, z = \frac{41.13-42}{\frac{5 }{\sqrt{100}}}
test statistic, z = −1.74
Answer:
The number of boys in the course will be = 140
Step-by-step explanation:
Given:
Total number of students enrolled in an introductory biology course = 364
There are 5 boys to every 8 girls in the course.
To find how many boys are in the course.
Solution:
Since, there are 5 boys to every 8 girls in the course.
So, ratio of boys to girls enrolled in the course = 5 : 8
Let the number of boys in the course be =
Then number of girls in the course will be =
Total number of students would be given as:
⇒ <em>Number of boys + Number of girls</em>
⇒
⇒
Total number of students given = 364.
Thus, we have:
solving for
Dividing both sides by 13.
∴
So, number of boys in the course will be = = 140