Mathematics, 17.07.2019 16:00 Jadalamanna
Amedical researcher studies the correlation between the number of hours spent at office jobs and the incidence of chronic back ache. which statement best describes why the investigation is an observational study? a) the researcher does not use a control group. b) the researcher does not intervene to vary conditions. c) it is not possible to obtain a random sample of office workers. d) it is not possible to establish a cause-effect relation between the variables.
Answers: 1
Mathematics, 21.06.2019 18:00
In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?
Answers: 3
Mathematics, 21.06.2019 20:00
Write each of the following numerals in base 10. for base twelve, t and e represent the face values ten and eleven, respectively. 114 base 5 89t base 12
Answers: 1
Mathematics, 22.06.2019 02:50
Aresearcher believes increased perceived control influence the well-being of residents at a nursing home. to test this , she allowed one group of residents to have control over their daily lies, (where to eat etc) . the other group of 5 residents had these deceisions made by staff. the resident's feelings of well-being were measured on a 10 point scale at the end of a one month trial period. is there a difference on well-being?
Answers: 2
Mathematics, 22.06.2019 05:00
Abuilder divides a rectangular plot in half along the diagonal.if the plot is 1\2-mile wde and the diagonal measures 1 3\10-miles long,what is the length of the plot?
Answers: 1
Amedical researcher studies the correlation between the number of hours spent at office jobs and the...
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