Maria wants to determine which student is favored for president of the student council. Which of the following samples are biased and not random? Select all that apply.

What are the sotions to the quadratic equation 9x^2=4

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

Me 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.