Question

please i need help i will give a medal who ever helps!!!

Answer 1

with?

Answer 2

please help @ganeshie8!

Answer 3

@ParthKohli please help i need help!

Answer 4

@mathmale

Answer 5

Which part?

Answer 6

all of it!

Answer 7

Even a?

Answer 8

no

Answer 9

So the table?

Answer 10

yes

Answer 11

\[\large \color{black}{\begin{align}
\begin{array}{|c|c|c|} \hline
X & X-(X) & (X-(X)^2 \ \\ \hline
22& & \\ \hline
& & \\ \hline
& & \\ \hline
& & \\ \hline
\end{array}
\end{align}}\]

Answer 12

Start by filling out the X column.

Answer 13

with what?

Answer 14

The given weights

Answer 15

in order or just the way its given?

Answer 16

In any order

Answer 17

ok then

Answer 18

So what will be the new table look like?

Answer 19

Like this right?

Answer 20

\[\large \color{black}{\begin{align}
\begin{array}{|c|c|c|} \hline
X & X-(X) & (X-(X))^2 \ \\ \hline
22& & \\ \hline
18 & & \\ \hline
14& & \\ \hline
30& & \\ \hline
26& & \\ \hline
\end{array}
\end{align}}\]

Answer 21

that's what i got

Answer 22

X -(X)
means the value of X - mean
So 22 will be
22- mean
22-22
0

Answer 23

ok but what about the other empty columns like the x-x and the (x-x)2

Answer 24

Yeah but first fill out the X- X

Answer 25

So tell me the X-X (X-mean) values for the other sets of data

Answer 26

so for the second column i right for x-x is 22- then for the (x-x)2 is 22-22

Answer 27

Can you rephrase what you just said?

Answer 28

for the second column next to the numbers for x-x is 22- and for the (x-x)2 is 22-22?
and for the other data set is it like 18-18 or 14-14 or is it 18-22 or 14-22? please help im getting confused.

Answer 29

Lets just focus on X-X and NOTon (X-X)²
X-X is just Value - Mean
So if the X is 13 then it will be 13-22

Answer 30

oh i thought it would be that way and it was

Answer 31

\[\large \color{black}{\begin{align}
\begin{array}{|c|c|c|} \hline
X & X-(X) & (X-(X))^2 \ \\ \hline
22& 22-22=0 & 0^2 \\ \hline
18 & & \\ \hline
14& & \\ \hline
30& & \\ \hline
26& & \\ \hline
\end{array}
\end{align}}\]

Answer 32

Can you complete the table?

Answer 33

yes but what about part c and d i don't understand that?

Answer 34

After completing your table will look like this
\[\large \color{black}{\begin{align}
\begin{array}{|c|c|c|} \hline
X & X-(X) & (X-(X))^2 \ \\ \hline
22& 0 & 0 \\ \hline
18 & -4 & 16 \\ \hline
14& -8&64 \\ \hline
30& 8&64 \\ \hline
26&4 &16 \\ \hline
Σ& 0& 160 \\ \hline
\end{array}
\end{align}}\]
Now to find out standard deviation, apply the formula
\[std = \sqrt{\frac{Σ(X-(X)^2)}{Number~of~values}}\]

Answer 35

ok now what how do i do that?

Answer 36

What is the value of Σ(x-(x))² ? HInt: Look at the table

Answer 37

so you take the like -4 to the power of 2 which is 16 and ?

Answer 38

im confused can you just tell what the answer is for c and d? please?

Answer 39

No
Σ(x-(x))² = Add all the values in (x-(x))² column

Answer 40

i did that its full? im getting confused because i don't understand the standard deviation part?

Answer 41

I am explaining but please don't rush to the answer. First tell me what's the value of Σ(x-(x))²

Answer 42

can you give me the answer at least for the first one like an example so i can se one?

Answer 43

After completing your table will look like this
\[\large \color{black}{\begin{align}
\begin{array}{|c|c|c|} \hline
X & X-(X) & (X-(X))^2 \ \\ \hline
22& 0 & 0 \\ \hline
18 & -4 & 16 \\ \hline
14& -8&64 \\ \hline
30& 8&64 \\ \hline
26&4 &16 \\ \hline
Σ& 0& \text{Add all the values in this column} \\ \hline
\end{array}
\end{align}}\]

Answer 44

that's what my table was looking like before now i odnt understand what standard devation.

Answer 45

In part c They are asking standard deviation right? That's what I am explaining

Answer 46

ok so the (x-x)2 means that how far numbers are spread out

Answer 47

Yes

Answer 48

@FaiqRaees now what?

Answer 49

After completing your table will look like this
\[\large \color{black}{\begin{align}
\begin{array}{|c|c|c|} \hline
X & X-(X) & (X-(X))^2 \ \\ \hline
22& 0 & 0 \\ \hline
18 & -4 & 16 \\ \hline
14& -8&64 \\ \hline
30& 8&64 \\ \hline
26&4 &16 \\ \hline
Σ& 0& \text{Add all the values in this column} \\ \hline
\end{array}
\end{align}}\]

Answer 50

i added the values and got 160 is that correct?

Answer 51

Correct

Answer 52

Now to find out standard deviation, apply the formula
\[std = \sqrt{\frac{Σ(X-(X)^2)}{Number~of~values}}\]

Answer 53

Σ(x-(x))² = 160

Answer 54

so 22(22-(22))2=160

Answer 55

No Σ means sum
So Σ(x-(x))² means sum of (x-(x))²

Answer 56

Now to find out standard deviation, apply the formula
\[std = \sqrt{\frac{160}{5}}\]

Answer 57

oh so like 16(18-(22))2=160 like that?

Answer 58

@FaiqRaees

Answer 59

Σ(x-(x))² = 0+16+64+64+16
Σ(x-(x))² = 160

Answer 60

160(22-(22))2

Answer 61

@FaiqRaees

Answer 62

please can you just tell me the answer because its due soon! please and i have somewhere to go so please tell me whats the answer?

Answer 63

Now to find out standard deviation, apply the formula
\[std = \sqrt{\frac{160}{5}}\]

Answer 64

so 160/16

Answer 65

@FaiqRaees

Answer 66

no
what's the value of 160/5

Answer 67

its 32

Answer 68

@FaiqRaees

Answer 69

And the square root of 32 is?

Answer 70

5.65

Answer 71

@FaiqRaees

Answer 72

yes this is the standard deviation

Answer 73

ok now what?

Answer 74

@FaiqRaees

Answer 75

That's the asnwer of C

Answer 76

ok what about d

Answer 77

@FaiqRaees

Answer 78

@FaiqRaees

Answer 79

@FaiqRaees whats the answer for d

Answer 80

@FaiqRaees

Answer 81

@FaiqRaees

Answer 82

Faiq would be more likely to respond to your posts if you'd show all the work you've done, instead of asking a wide-open question such as "What aboput D?" Same with me.

Answer 83

ok so can you help me?

Answer 84

@FaiqRaees i got the part c correct but im trying to understand and try to the answer for part d can you please help me?