Answer:
P ( 23 < X < 64.7 ) = P ( -1 < Z < 2 ) = 0.8186
Step-by-step explanation:
Solution:
- Let X be a random variable that denotes the age of people who use smartphones.
- The random variable X follows a normal distribution with parameters mean (u) and standard deviation (s).
-The normal distribution can be expressed as:
X~ N ( u , s^2 )
X~ N ( 36.9 , 13.9^2 )
- The probability that a random smartphone user in the age range 13 to 55+ is between 23 and 64.7 years old can be expressed as:
P ( 23 < X < 64.7 )
- We will compute the Z-score values for the interval:
P ( 23 < X < 64.7 ) = P ( (x1 - u) / s < Z < (x2 - u) / s )
P ( 23 < X < 64.7 ) = P ( (23 - 36.9) / 13.9 < Z < (64.7 - 36.9) / 13.9 )
P ( 23 < X < 64.7 ) = P ( -1 < Z < 2 )
- We will use Z-table to evaluate:
P ( 23 < X < 64.7 ) = P ( -1 < Z < 2 ) = 0.8186
Answer:
yes
Step-by-step explanation:
Answer:
Option B is the correct answer
Step-by-step explanation:
<u>A line segment is a line drawn with two end points.</u>
1.) Option A is a point
2.) <u>Option B is a line segment</u>
3.) Option C is a ray
4.) Option D is a line
Hope this helps!
it would be 2 bcs 24/2=12 and 28/2=14
Okay the height would be nice if it would have to come
