Year 10 Term 2

Question 1

Calculation for mean?

Answer 1

          Frequency

Question 2

Look at your book for dtem and leaf diagrams diva 😍

Answer 2

Do it

Question 3

Why cant you make a prediction for data outside the data set?

Answer 3

It is unreliable. This is called an extrapolation

Question 4

What is truncation?

Answer 4

A number where all digits are removed after a certain point. This is NOT the same as rounding

Eg.

7.379 truncated to 2 d.p is 7.37

Question 5

How to find the upper/lower bounds for ROUNDING?

Answer 5

Add/subtract half the accuracy

Question 6

How to find the upper/lower bounds for TRUNCATING?

Answer 6

Lower bound is the same as the truncated number, for the upper bound add the accuracy

Eg find upper and lower bounds of x when truncated to 1dp is 3.5

LB: 3.5
UB: 3.6

Question 7

How to represent error intervals?

Answer 7

LB ≤ x < UB

Question 8

Erm plsplspls look at suitable degrees of accuracy in your book

Answer 8

Pretty please

Question 9

What do you do if one simultaneous equation is non-linear and the other isn’t?

Answer 9

You substitute the linear one into the non-linear one.

You will end up with two solutions.

Question 10

Equation for volume of a pyramid?

Answer 10

⅓ x base area x height

Question 11

Equation for 3d pythagoras of a cuboid with dimensions x, y and z?

Answer 11

___________
√x² + y² + z²

However, you can just di individual pythagoras for each length