Answer:
σ =2√2 .....
Step-by-step explanation:
Lets find the mean first
mean = 2+4+6+8+10/5
m = 30/5
m = 6
σ =√1/5[(2-6)²+(4-6)²+(6-6)²+(8-6)²+(10-6)²]
σ = √1/5[(-4)²+(-2)²+(0)²+(2)²+(4)²]
σ=√1/5[(16+4+0+4+16)]
σ = √1/5(40)
σ = √8
Take the square root of 8.
σ =2√2 .....
Answer:
1) f is the name of the function
2) x is the argument
3) output is (3x + 1)
Step-by-step explanation:
In function notation, The expression "f (x)" simply means that f is a formula that has an input variable known as "x". It should be noted that f(x) does not imply that we multiply f and x. Hence, f is the name of the function.
Now, the term "x" is an input variable known as the argument of the function.
f(x) is the output of the function and is; 3x + 1
The sides of a rhombus are equal length, so you have
... 5x + 20 = 6x + 10
... 10 = x . . . . . . . . subtract 5x+10
Then the side lengths are
... 5·10 +10 = 70
Answer:
22.51% probability that fewer than 4 of them use their smartphones in meetings or classes.
Step-by-step explanation:
For each adult, there are only two possible outcomes. Either they use their smartphones in meetings or classes, or they do not. The probability of an adult using their phone is independent of other adults. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which is the number of different combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening
47% use them in meetings or classes.
This means that
10 adult smartphone users are randomly selected
This means that
Find the probability that fewer than 4 of them use their smartphones in meetings or classes.
In which
22.51% probability that fewer than 4 of them use their smartphones in meetings or classes.