Scores on a test are normally distributed with a mean of 68.2 and a standard deviation of 10.4. Estimate the probability that among 75 randomly selscted students, at least 20 of them score greater that 78.
Answers
Now, the event that any given student scores higher than 78 follows a binomial distribution. Here you have 75 total students (so
So the probability of getting 20 students that fit the criterion is
Related Questions
What is the product of 32/3 and 142/5
Scientific notation 2/10=?and 12 thousandth =? show the work.
Pls help8th math Pls
The quotient of x and 4
Answers
1)we have to calculate the first derived
f´(x)=8-6x
2) we have to equalizate the first derived to "0", and find out the value of "x".
8-6x=0
-6x=-8
x=-8/-6=4/3
3)we have to calculate the second derived
f´´(X)=-6<0 ⇒ at x=4/3 we have a maximum.
4) we find the value of "y"
f(4/3)=1+8(4/3)-3(4/3)²=1+(32/3)-(48/9)=57/9
Therefore:
at (4/3 , 57/9) have a maximum
Answers
Answer:
The mean absolute deviation is 1
Step-by-step equation =
Take all of the numbers and add them together.
4+1+2+1+0+1= 9
Then divide by how many numbers there are. In this word problem its 6.
Divide 9 by 6.
9 ÷ 6 = 1.5
So 1.5 would be our mean.
To find the mean absolute deviation subtract our mean and our original numbers.
1.5 - 4 = 2.5
1.5 - 1 = 0.5
1.5 - 2 = -0.5
1.5 - 1 = 0.5
1.5 - 0 = 1.5
1.5 - 1 = 0.5
Add all of those numbers together.
2.5 + 0.5 + 0.5 + 0.5 + 1.5 + 0.5 = 6
Even though one of the numbers was a negative answer we add it as a positive because the mean absolute deviation can never be negative
Divide by the amount of numbers you added.
6 ÷ 6 = 1
So the mean absolute deviation is 1
I also took the test that had 10 questions and got a 100
I'm pretty late to answer but hope this helps for others in the future
I learned this like a week or less ago so my explanation might not make the most sense.
Answer:
67
Step-by-step explanation:
B.) y = -2
C.) x = -2
D.) x = -1
Answers
Answer:
A.) y = -1
Step-by-step explanation:
The equation of a horizontal line is ...
y = constant
To make that line go through the point (x, y) = (-2, -1), the constant must match the y-coordinate of the point: -1.
y = -1
Answers
The required number is 132.
It is required to find the number.
What is arithmetic?
Arithmetic is the branch of mathematics that deals with the study of numbers using various operations on them. Basic operations of math are addition, subtraction, multiplication and division. These operations are denoted by the given symbols.
Given:
According to given question we have,
Let the number be x.
1/11w - 12
1/11w-12=0
Add 12 both sides we get,
1/11w-12+12=0+12
1/11w=12
w = 132
Therefore, the required number is 132.
Learn more about arithmetic here:
#SPJ2
Let w be the number.
1/11w - 12
1/11w-12=0
1/11w-12+12=0+12
1/11w=12
1/11w÷1/11=12÷1/11
w = 132
Therefore, the equation would be 1/11w - 12 and the value of w is 132.
Answers
0,02 59
<----|
* 100 = 10²
0,0259 = 2,59* 10⁻²
........................................
5,5820
5,5820*10⁰
........................................
0,009 73
<------|
*1000 = 10³
0,00973 = 9,73*10⁻³
.........................................
8 56
|------>
: 100 = 10²
856 = 8,56 *10²
.........................................
0,0007 2
<-------|
* 10 000 = 10⁴
7,2 * 10⁻⁴
....................................
0,001 216
<------|
* 1000 = 10³
1,216 * 10⁻³
Answers
Answer:
30%
Step-by-step explanation:
Answer:
65%
Step-by-step explanation: