Mathematics, 14.09.2019 20:10 fluffy374747
4)
a, b, c and d are four points on the circumference of a circle.
abe and dce are straight lines.
angle bac = 21". angle ebc = 58°.
diagram not
accurately drawn
a) find the size of angle adc.
b) find the size of angle adb.
angle cad = 69
c) is bd a diameter of the circle?
you must explain your answer.
Answers: 2
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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
4)
a, b, c and d are four points on the circumference of a circle.
abe and dce are strai...
a, b, c and d are four points on the circumference of a circle.
abe and dce are strai...
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