Why is random assignment important? random assignment ensures that the groups are matched on some variable before the experiment. random assignment to make the groups equal on a variety of variables. random assignment ensures that each member of the population has an equal chance of being chosen to be in the experiment. random assignment increases the test-retest reliability of the experiment?

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

He concluded that a heavier object dropped from the same height as a lighter object will land

Now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.