Complete the chart to find the mean, variance and standard deviation. remember to use commas and round numbers to the nearest tenth. x _ x _ x - x _ (x - x)2 1. 45 = -357.5 = the mean is 2. 340 = -62.5 = the median is 3. 400 = -2.5 = the variance is 4. 825 = 422.5 = the standard deviation is σ x = _ x = _ σ (x - x)2 = 310,225.2 n =

Needmax 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.

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.