Answer with Step-by-step explanation:
Since we have given that
Number of students = 100
Mean = 21.3 years
In what way are descriptive statistics involved in this example?
As we know that descriptive statistics gives information that explains the data is specific manner and while measuring the mean age of the 100 students she needs to collect data by asking their age from them.
In what way are inferential statistics involved?
As we know that inferential statistics form inferences about given populations using given data, so when she estimate the mean age of 100 students, she will use data of 100 students. So, she is using inferential statistics.
Answer:
0.1728
Step-by-step explanation:
6^-2= 1/6^2
3^-3= 1/3^3
1/36 * 1/27 * 3.6 * 3.6 * 3.6
= 0.1728
Answer:
x = 60
Step-by-step explanation:
The two angles shown here are known as corresponding angles. This means they both equal the same amount of degrees. Knowing this, we can set up an equation:
2x + 15 = 135
2x = 120
x = 60
Therefore, x = 60
You can check your answer by substituting the answer for x:
2(60) + 15 = 135
120 + 15 = 135
135 = 135
Answer:56/x
Step-by-step explanation:
that is the answer
The probability that a grain of rice dropped onto the circles at random lands outside the circle with the 4-cm radius and inside the circle with a radius of 8 cm is 
or 75%.
Step-by-step explanation:
Step 1:
First, we need to calculate the areas of both circles.
The area of a circle 
where r is the radius of the circle.
The inner-circle has a radius of 4 cm.
The area of the inner circle
The outer circle has an inner radius of 4 cm and an outer radius of 8 cm.
So its area is 
where R is the outer radius and r is the inner radius.
The area of the outer circle
So the inner circle has an area of 50.264 square cm and the outer circle has an area of 150.792 square cm.
Step 2:
To find the probability of an event we divide the number of favorable outcomes by the total number of outcomes.
The total number of outcomes is the area of the entire circle
square cm.
The number of favorable outcomes is the area of the outer circle i.e. 150.792 square cm.
The probability of the rice falling in the outer circle 
.
