0 Frequency
Mathematics, 02.03.2021 17:30 dthompson365
The times taken by 25 people to complete a puzzle are shown.
Time, t minutes
0
Frequency
6
81
7
10
8
CO
20
7
30 < t < 40
4
Frequency
Draw a frequency polygon
for the data.
2
1
ws
0
0
40
10 20 30
Time, t (minutes)
Answers: 2
Mathematics, 21.06.2019 12:50
What constants do you need to add to each of the following quadratic equations to complete the square? 2x2 - 3x = 0 x2 - 8x = 0 2x2 - 11x = 18
Answers: 1
Mathematics, 21.06.2019 23:00
Each of the following data sets has a mean of x = 10. (i) 8 9 10 11 12 (ii) 7 9 10 11 13 (iii) 7 8 10 12 13 (a) without doing any computations, order the data sets according to increasing value of standard deviations. (i), (iii), (ii) (ii), (i), (iii) (iii), (i), (ii) (iii), (ii), (i) (i), (ii), (iii) (ii), (iii), (i) (b) why do you expect the difference in standard deviations between data sets (i) and (ii) to be greater than the difference in standard deviations between data sets (ii) and (iii)? hint: consider how much the data in the respective sets differ from the mean. the data change between data sets (i) and (ii) increased the squared difference îł(x - x)2 by more than data sets (ii) and (iii). the data change between data sets (ii) and (iii) increased the squared difference îł(x - x)2 by more than data sets (i) and (ii). the data change between data sets (i) and (ii) decreased the squared difference îł(x - x)2 by more than data sets (ii) and (iii). none of the above
Answers: 2
Mathematics, 21.06.2019 23:50
Find the interior angle of a regular polygon which has 6 sides
Answers: 1
The times taken by 25 people to complete a puzzle are shown.
Time, t minutes
0 Frequency
0 Frequency
Mathematics, 09.05.2021 06:20
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