Write the heading!!!

text

7

Theory/Notes

Write the heading!!!

Write the theory!!!

How to do this on the

calculator???

Ex 11A (p356-359) Q1(a,c,e), 4(a, b),

Ex 11A (p359) 6a, 7a

Write the heading!!!

Copy the Example, but add two columns to the right for ‘class-centre’

and fx like the one below

We need to use the ‘class-centre’

in our calculations for

‘mean’

Write the heading & the theory

Ex 11B p361

Q1,2(ev 2nd part)

Ex 11A (p359) 6a, 7a

Today: to do…

Quick Quiz

Median(theory)

Class work on Median

HW Sheet treat it like a Yr 11 exam paper

Write the heading & theory!!!

Copy out the Examples

Write the heading &

the Example 1.

Write the heading

Don’t copy out – just watch &

learn

Ex 11C (p363-366) Q1-2 (a,c,e), 3(a), 4(a,b),

5(all), 6(a) Note: Q5,6 similar to Eg 5 (p365) Use this as your model

Theory/NotesWrite this down…

Today: to do…

Quick Quiz

Info about HY Test date

Mark HW Sheet

Stem & Leaf Plots with Stats

Further revision for HY Test (eg hw sheet)

Write the heading &

the Example below

Ex 11D (p367)Q1 (all parts)

Write the heading & theory!!!

(1) Do Ex 11E p369 Q1-5,7-9

(2) Then read over p372, “The Range”

(3) Write the heading & theory!!!

(4) Then do Ex 11F Q1-3

Example 1Eg.1 Find the interquartile range for the scores… 1,2,2,5,7,9,10,10,11,11,11,11

To find the Interquartile Range,1. Find the median (Q2). This splits the scores into a lower and upper set.2. Find the median of the lower 50% (Q125%) and the median of the upper 50% (Q375%) of scores.3. Calculate Q3 – Q1.Note: If using a cumulative frequency graph (OGIVE), find Q1 and Q3 from the graph – see p376-377)

(2) Then do Ex 11G Q1. Then Read Eg 2(p374) and try Q2, Q4, Q6, Q8, See next slide for Q11(a,b), **Q13, Q14.

(1) Write the heading, theory &

example.

**Look at this example before you

try Q13, 14.(see p378 for

answers)

OGIVE!

Ex 11H Q1

Ex 11H Q2,3,4, do q5 as a class.

Write the heading & theory!!!

Class Discussion Example Don’t copy

this one

Exercise 11I Q1(a,b,c),2(a,c),3(a,c),

Q4(a,b)

Eg. 1 By creating a 5-Point summary for the set of scores below draw a box-and-whisker plot? (Use a horizontal scale of 1 cm = 2 marks)

40 42 44 45 48 5052 53 54 57 59 60

Class Discussion Example Don’t copy

this one either

Copy this one & complete

Starter (10 Min)From Friday’s lesson! Exercise 11I,

Q4.

• Statistics is about analysing sets of data. The standard deviation describes how spread out a set of scores is.

• The smaller the standard deviation, the less the spread of the scores.• Standard deviation has the symbol x or xn. (Access this on your

calculator)

Definition - Standard Deviation is found by finding the distances of all the scores from the mean and then taking an average of

these distances.

Eg. 1 Find the standard deviation of 5, 4, 2, 7, 6, 3, 4, 6, 8

Write the heading and copy the theory/example

Exercise 11J Q1-3,

Extension Q4-5HW – due Thur is Review 11 (p388-

389)