A large random sample of American students in seventh grade showed that 20% of them were reading
below grade level.
Based on this data, which of the following conclusions are valid?
Choose 1
(A)
About 20% of all American students in seventh grade were reading below grade level.
20% of this sample was reading below grade level, but we cannot conclude anything about
the population.
(C)
About 20% of all American students were reading below grade level.

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.