Help (please don’t attach any link because I can’t access to it) thank you! Practitioners of a controversial medical practice known as "therapeutic touch" claim that they can manipulate a
person's "human energy field" in order to provide healing powers, without actually touching the patient's body,
Emily Rosa, an 11-year-old in Colorado, recruited 21 practitioners of therapeutic touch in a study she conducted
in 1996.
Her study consisted of placing a screen between a subject's eyes and hands. For several trials, she hovered her
hand over one of theirs, flipping a coin each time to decide which hand to hold hers over. She then asked the
practitioner to decide which of their hands Emily's hand was near to see whether the practitioner could detect
Emily's energy field.
Would you be willing to generalize the results Emily obtained for these 21 practitioners to all practitioners?
Explain

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

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