Page 187 - TB_6B
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Answers
Unit 17. The Secret of Averages Math Story P. 6
P. 2~3 7.5, 9.5
Really? 7.5 9.0 9.5 8.5 9.0 43.5
I will work for this company. 43.5 points
Why is my salary so low? 43.5 5 8.7
You said that the average salary for your
employees is $5,000!
Why are you so angry? Activity 2 P. 7~8
I only told you the truth.
1. a. 68 =7
$1,000 2
Answers may vary. b . 15
Sample Answer c. 8
The store owner can say that the average profit
of the store is high, but in reality, the first few d. 138 140 = 139
months are only exceptionally high because it 2
had just opened.
2 . Mean: 76
Median: 94
Activity 1 P. 4~5 Mean: 82
Median: 83
125
5, 5 , 25, 4 The median should be used as a
representative value. Therefore, Jessica is
1. b. 6 7 5 10 8 6 =7 better at math.
6 Due to a missing test score, Jessica has a
lower mean value, even though the other
10 5 = 5 scores are all above Thomas’ math scores.
c. 14 16 20 20 24 50 = 24 November, 0
6
50 14 = 36 Activity 3 P. 9~10
d . 10 9 7 68 9 105 = 22
7
105 6 = 99 1234 5
2 . b . 60, 70, 60, 80, 90, 60 5
60 70 60 80 90 60 = 70 1 . b . 20 appears the most.
6
Therefore, 20 is the mode.
c . 4, 5, 5, 5, 6, 6, 7, 8, 8
c . 35 appears the most.
4 53 62 7 8 2 =6
9 Therefore, 35 is the mode.
d . 4 appears the most.
Therefore, 4 is the mode.
176
Unit 17. The Secret of Averages Math Story P. 6
P. 2~3 7.5, 9.5
Really? 7.5 9.0 9.5 8.5 9.0 43.5
I will work for this company. 43.5 points
Why is my salary so low? 43.5 5 8.7
You said that the average salary for your
employees is $5,000!
Why are you so angry? Activity 2 P. 7~8
I only told you the truth.
1. a. 68 =7
$1,000 2
Answers may vary. b . 15
Sample Answer c. 8
The store owner can say that the average profit
of the store is high, but in reality, the first few d. 138 140 = 139
months are only exceptionally high because it 2
had just opened.
2 . Mean: 76
Median: 94
Activity 1 P. 4~5 Mean: 82
Median: 83
125
5, 5 , 25, 4 The median should be used as a
representative value. Therefore, Jessica is
1. b. 6 7 5 10 8 6 =7 better at math.
6 Due to a missing test score, Jessica has a
lower mean value, even though the other
10 5 = 5 scores are all above Thomas’ math scores.
c. 14 16 20 20 24 50 = 24 November, 0
6
50 14 = 36 Activity 3 P. 9~10
d . 10 9 7 68 9 105 = 22
7
105 6 = 99 1234 5
2 . b . 60, 70, 60, 80, 90, 60 5
60 70 60 80 90 60 = 70 1 . b . 20 appears the most.
6
Therefore, 20 is the mode.
c . 4, 5, 5, 5, 6, 6, 7, 8, 8
c . 35 appears the most.
4 53 62 7 8 2 =6
9 Therefore, 35 is the mode.
d . 4 appears the most.
Therefore, 4 is the mode.
176
