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Taya2010 [7]
3 years ago
11

In an experiment on the behavior of young children, each placed in an area with five toys. The variable of interest X is the num

ber of toys that the child plays with. Past experiments with many subjects have shown that the probability distribution of the number of toys played with is as follows:
X(number of toys) | 0 | 1 | 2 | 3 | 4 | 5
P(X) | 0.03 | 0.16 | 0.30 | 0.23 | 0.17 | 0.11

a) How many toys might you expect a child to play with?
b) What is the standard deviation of the number of toys played with?
c) Describe how you might carry out a simulation to estimate the mean number of toys played with (don't actually do that simulation, just set it up).
Mathematics
1 answer:
Fofino [41]3 years ago
4 0

Answer:

a)15 b)2.34 c)by taking sum of number of toy divide to its numberings

Step-by-step explanation:

  • in roman a number of toys is equal to the sum of all toys and standard deviation is obtained from formula
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At a party there are 30 students over age 21 and 20 students under age 21. You choose at random 3 of those over 21 and separatel
Sergio039 [100]

Answer:

10%

Step-by-step explanation:

According to the scenario, given data are as follows:

Students over age 21 = 30

Students under age 21 = 20

Choose student over age 21 = 3

Choose student under age 21 = 2

So, we can calculate chances by using following method,

Chances of student over age 21 = Number of choose student ÷ Total students

= 3 ÷ 30  = 0.10 = 10%

Similarly, Chances of student under age 21 = Number of choose student ÷ Total students

= 2 ÷ 20  = 0.10 = 10%

Hence, in both condition, chances are 10%.

3 0
3 years ago
Find the cube rots of 8.
Marta_Voda [28]

Answer:

cube root of 8 is 2

Step-by-step explanation:

given data

number =  8

to find out

cube rots of 8  

solution

we know that here cube root any positive no is positive and cube root any negative no is negative  

we consider here cube rots of 8  = x  

and a cube root of a number 8 is a number x  

such that x³ = 8      ..................1

and we know 8 = 2× 2×2

x³ = 2× 2×2

x³ = 2³

x = 2  

so here cube root of 8 is 2

7 0
3 years ago
Graph the linear equation
baherus [9]
For the equation
.. x - y = 4
you can divide by 4 to put the equation into intercept form. This form shows you both interecepts at once.
.. x/4 +y/(-4) = 1

The x-intercept is (4, 0).
The y-intercept is (0, -4).

The graph is shown below.

7 0
3 years ago
Lesson 12.03 plot twist<br> What is the total number of ski trails
kkurt [141]

There are 12 number of ski trails shown in the table.

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more variables and numbers.

From the table attached, we can see that there are only 12 different ski distances, that is there are 12 data's in the table, hence:

The total number of ski trails = 12

There are 12 number of ski trails shown in the table.

Find out more on equation at: brainly.com/question/2972832

3 0
3 years ago
Solve the system using elimination.<br> 7x - 5y = 26<br> 2x+4y= 2
ella [17]

Answer:

x=3, y=-1. (3, -1).

Step-by-step explanation:

7x-5y=26

2x+4y=2

--------------

simplify 2x+4y=2 into x+2y=1

-------------

7x-5y=26

x+2y=1

-----------------

x=1-2y

7(1-2y)-5y=26

7-14y-5y=26

7-19y=26

19y=7-26

19y=-19

y=-19/19

y=-1

x+2(-1)=1

x-2=1

x=1+2

x=3

3 0
4 years ago
Read 2 more answers
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