Suggested solutions for Core, Graphs, Networks and Matrices

[stonecold]

What is Q3 core?

[Studyinghard]

i got 37, had no clue for question 3 (core), i put d or e. can anyone please explain how question 11 core was e?
i got c, i ust don't know how it was e

You plot 1/x against y and then get the regression line as 249

[naved_s9994]

It is C.

I'll explain why.

#1.    180 degrees is the 'median'.
#2.    Looking at the box plot, it is evident that it is skewed. Positively skewed.
#3.    The 68-95-99.7% rule, is a measure from the 'mean'!
#4.    We are unsure, but can guess the mean. (You could calculate, but it would take time).
#5.    Hence, as you are not sure of the Mean, because it is skewed the median does not equal
        the mean.
#6.    Therefore you use s= range/4  to obtain the standard deviation.

Viola:  Option C is the most correct option.

[superstar1]

thankyou u just boosted my confidenvce. so now im loookin at 38 out of 40.

[Studyinghard]

It is C.

I'll explain why.

#1.    180 degrees is the 'median'.
#2.    Looking at the box plot, it is evident that it is skewed. Positively skewed.
#3.    The 68-95-99.7% rule, is a measure from the 'mean'!
#4.    We are unsure, but can guess the mean. (You could calculate, but it would take time).
#5.    Hence, as you are not sure of the Mean, because it is skewed the median does not equal
        the mean.
#6.    Therefore you use s= range/4  to obtain the standard deviation.

Viola:  Option C is correct.

I wouldnt say its skewed but more approximately symmetric therefore answer is B

[stonecold]

Someone post up the question!!!

[superstar1]

thanks now my confidence got stuffed.

[citizen]

i got 37, had no clue for question 3 (core), i put d or e. can anyone please explain how question 11 core was e?
i got c, i ust don't know how it was e

You plot 1/x against y and then get the regression line as 249

oh ok...i did a 1/y trasformation. why isn't that right?

[naved_s9994]

It is C.

I'll explain why.

#1.    180 degrees is the 'median'.
#2.    Looking at the box plot, it is evident that it is skewed. Positively skewed.
#3.    The 68-95-99.7% rule, is a measure from the 'mean'!
#4.    We are unsure, but can guess the mean. (You could calculate, but it would take time).
#5.    Hence, as you are not sure of the Mean, because it is skewed the median does not equal
        the mean.
#6.    Therefore you use s= range/4  to obtain the standard deviation.

Viola:  Option C is correct.

I wouldnt say its skewed but more approximately symmetric therefore answer is B

Get a ruler out sir.
Then measure the distance from Q3 to Median , and Q1 to Median on the box plot.

It is evident it is slightly skewed.

[nbalakers24]

Add up the percentages. 64% is within one sd. 95% is within two sd and so on

[superstar1]

thanks NAved ur the man.

[Studyinghard]

It is C.

I'll explain why.

#1.    180 degrees is the 'median'.
#2.    Looking at the box plot, it is evident that it is skewed. Positively skewed.
#3.    The 68-95-99.7% rule, is a measure from the 'mean'!
#4.    We are unsure, but can guess the mean. (You could calculate, but it would take time).
#5.    Hence, as you are not sure of the Mean, because it is skewed the median does not equal
        the mean.
#6.    Therefore you use s= range/4  to obtain the standard deviation.

Viola:  Option C is correct.

I wouldnt say its skewed but more approximately symmetric therefore answer is B

Get a ruler out sir.
Then measure the distance from Q3 to Median , and Q1 to Median on the box plot.

It is evident it is slightly skewed.

thats what I said? approximately symmetric = slightly skewed.

[naved_s9994]

thanks NAved ur the man.

Thanks, but your the Numero Uno 'superstar'

It is C.

I'll explain why.

#1.    180 degrees is the 'median'.
#2.    Looking at the box plot, it is evident that it is skewed. Positively skewed.
#3.    The 68-95-99.7% rule, is a measure from the 'mean'!
#4.    We are unsure, but can guess the mean. (You could calculate, but it would take time).
#5.    Hence, as you are not sure of the Mean, because it is skewed the median does not equal
        the mean.
#6.    Therefore you use s= range/4  to obtain the standard deviation.

Viola:  Option C is correct.

I wouldnt say its skewed but more approximately symmetric therefore answer is B

Get a ruler out sir.
Then measure the distance from Q3 to Median , and Q1 to Median on the box plot.

It is evident it is slightly skewed.

thats what I said? approximately symmetric = slightly skewed.

Yeah, my mis-interpretation. Sorry mate

[superstar1]

?

[nickk]

Core
1D
2D
3B (Someone check this please)
4A
5C
6C
7B
8B
9B
10A
11E
12D
13B


Matrices
1C
2A
3E
4B
5D
6C
7D
8E
9B

these look right and my suggested solutions to
Geometry and Trigonometry

1C
2B
3C
4D
5A
6D
7C
8C
9B

BUSINESS RELATED MATHS
1E
2D
3E
4B
5C
6A
7D
8B
9D