Let x1, be a random sample from distributions with the given probability density functions. in each case, find the maximum likelihood estimator theta f(x; theta) = (1/theta2)xe-x/theta, 0 < x < infinity, 0 < theta < infinity. f(x; theta) = (l/2theta3)x2 e-x/theta, 0 < x < infinity, 0 < theta < infinity. f(x; theta) = (1/2)e- x- theta , -infinity

What is the solution of sqrt x+2-15=-3

Agroup of student volunteers participates in a study designed to assess several behavioral interventions for improving output in a repetitive task. prior to the beginning of the study, all volunteers unknowingly observed, and their output is measured. at the beginning of the study, prior to any intervention, the volunteers perform the same task under the observation of a study administrator, and their overall output increases. which of the following terms describes this phenomenon? a. simpson's paradox b. hawthorne effect are d. novelty effect d. pygmalion effect e. observer-expectancy effect

Researchers are conducting experiments to determine the role of alcohol in the development of depression. after the study is complete, they determine that the relative risk of developing depression is 1.55 with a 95 % ci of 1.2 -1.9. each group is then divided into nonsmokers and smokers. the relative risk for the nonsmokers is 1.12 with a 95% ci of 0.87-1.37. the relative risk for the smokers is 1.7 with a 95 % cl of 1.5-1.9. what type of bias may affect this study? a. procedure bias b. recall bias c. selection bias d. confounding e. lead-time bias