mean mediam and mode (range)

Statistics                                                           name:Taani

WALT- Identify the mean, median and mode within a collection of data

Activity One

Answer the questions in a different colour

The definition of the mean in a statistical investigation is commonly referred to as the average. It is the total of all the data divided by the amount of data shown.

For example: if we have this range of data 3,5,7,1,2,3,6,8

3+5+7+1+2+3+6+5  = 32  = 4

             8                      8

1. Find the mean in this set of numbers

3,7,8,4,2,6,5,4,3,9            2,3,3,4,4,5,6,8,9 = 4

2. Find the mean in the set of numbers

4,12,5,6,11,9,5                     4,5,5,6,9,11,12 = 6

3. Find the mean in this tally chart

Pets owned by students	Number of students
Dogs	IIIII IIIII
Cats	IIIII IIIII II
Fish	IIII
Rabbits	II          = 4

4. Find the mean in this set of numbers

24,12,16,18                    12,16,18,24  34 / 4  =8.5

5. Find the mean in this set of numbers

5,9,12,4,10,7                         4,5,9,7,10,12  16 / 6 = 2.6

6. CHALLENGE QUESTION: Find the mean within this data, use the frequency table to help you

1,5,5,2,1,2,5,5,5,5,1,2,1,5,5   1,1,1,1,2,2,2,5,5,5,5,5,5,5,5,

Score	Frequency
1	4
2	3
5	8
Total	15

Activity Two

Answer the questions in a different colour

The definition of the median is the middle number within a set of numbers that have been put in order from size (biggest to smallest or smallest to biggest)

For example: 2,6,4,1,9 = 1,2,4,6,9 and the middle number is 4.

BUT say if there is more than one middle number… the median is found by taking the number midway between the middle pair of numbers:

3,6,1,4,9,2 = 1,2,3,4,6,9 → 3 + 4 = 3.5

                                             2

Find the median in these sets of numbers

1. 10,14,17,12,19,11,16   10,11,12,14,16,17,19 = 14

2. 34,42,37,31,40    31,34,47,40,42 =47

3. 101, 167,138,124,198,149    101,124,138,149,167,198        138 + 149 = 287/2 =143.5

4. 54, 58,52,57,53,60     52,53,54,57,58,60  54+57 = 111

5. 1001, 1094, 1023, 1065, 1038, 1027, 1042            1001,1023,1027,1038,1042,1065,1095 =1038  

6. Find the median within this tally chart

Pets owned by students	Number of students
Dogs	IIIII IIIII  10
Cats	IIIII II 7
Fish	IIII 4
Rabbits	IIIII III 8
Hamsters	II 2     2,4,7,8,10   = 7

Activity Three

The mode is the most frequent number in a set of data. The number that occurs most often.

For example: In a set of numbers 3, 7, 8, 4, 2, 6, 5, 4, 3, 9 there is two modes, 3 and 4 because they appear twice in the data set.

Note- There can either be 0, 1 or 2 modes. If there are 3 or more numbers occur the same number of times, there is no mode.

Find the mode in these sets of numbers

1. 2, 1, 5, 3, 7, 8, 5, 3 ,9  = 3,5
2. 1, 5, 3, 2, 9 ,4, 1, 6, 8, 0 =1,
3. 23, 45, 78, 12, 45, 67, 32, 46, 93, = 45,
4. 101, 121, 123, 145, 167, 121, 139, 145, 176 = 145,121
5. 394, 273, 219, 294, 183, 291, 273, 288, 271  = 273,

My i can test to be improved and inproved

I kan test

yesterday (date 31/5/17) at school in the afternoon half of my maths group did a test the test was more different than last term. Last term our whole maths class did the test on a sheet of paper all of us had a i kan sheet with a tv saying the questions to us this term we changed it a bit. We first got headphones and put them in our chromebook we then got given a ikan test sheet.

Than we went on the test called ikan on the ikan test we had to answer really fast  it shows for 5 seconds and goes to the next one. After the test was finished we waited for the next day./the next day we had to mark our test so we did it ourselves no teachers just ourselves i marked mine and another new thing that we could fix up our own answers.this term i think ive done better at ikan test just because we changed it up a little

I made a story on how ikan test could be inproved and was inproved my test scores for number sequence and order(stage7/8)fraction(stage4.5/8)place value(stage7/8)basic facts(stage5.5/7 )

my old score was probly not as good as these test scores. date (01/06/17)I need to work on my fractions

year 7 activates/Team building

Team building

This week on Wednesday Thursday and Friday we did activities on Wednesday we did a stacking competition with my group my group name is Fobalicious we first made spaghetti and marshmallow towers the highest one got a prize out 4 groups of 6 one of the our group made amazing tower that was the second tallest out of cherry’s and munches the cherry’s made the second tallest tower and the munches made the 3rd  tallest tower.

Word problems

today i have finishied word problems the hardest slide was slide 8 and 6 the easyest one was slide 2

Intro: statistics

Today the 11/05/17 I have done statistics vocabulary,types of graghs,pictograms,strip graghs, dot plots, stem and leaf,  and other things. I have done all of the 13/14 slides, the slide i found the easyes was slide 4 the pictogram the slide i found the hardest was the stem and leaf grath examples.

Inquiry

today I have made a DLO about now thats thinking.