Mathematics, 30.03.2021 17:50 mommer2019
Courtney got 64 out of 75 correct on a test. What is the best estimate of the
percent Courtney got correct?
A 64%
B 75%
C 85%
D 117%
Answers: 3
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Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4
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Select all of the following expressions that are equal to 2.5.
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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 รฎล(x - x)2 by more than data sets (ii) and (iii). the data change between data sets (ii) and (iii) increased the squared difference รฎล(x - x)2 by more than data sets (i) and (ii). the data change between data sets (i) and (ii) decreased the squared difference รฎล(x - x)2 by more than data sets (ii) and (iii). none of the above
Answers: 2
Courtney got 64 out of 75 correct on a test. What is the best estimate of the
percent Courtney got...
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