Mathematics, 10.03.2020 20:16 daniellekennedy05
An investigator wants to use a straight line to predict IQ from lead levels in the blood, for a representative group of children aged 5β9.14 There is a weak positive association in the data. Answer true or false:a. He can use many different lines. b. He has to use the regression line. c. Only the regression line has an r. m.s. error. d. Any line he uses will have an r. m.s. error. e. Among all lines, the regression line has the smallest r. m.s. error.
Answers: 2
Mathematics, 21.06.2019 23:20
Which expression is a factor of 12x2 + 29x β 8? x β 8 2x β 1 3x + 8 4x + 1
Answers: 1
Mathematics, 22.06.2019 00:30
Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)
Answers: 2
Mathematics, 22.06.2019 01:20
Describe how to determine the average rate of change between x = 4 and x = 6 for the function f(x) = 2x^3 + 4. include the average rate of change in your answer.
Answers: 3
An investigator wants to use a straight line to predict IQ from lead levels in the blood, for a repr...
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