Forty different video games showing violence were observed. the duration times of violence (in seconds) were recorded. when using this sample for a t test of the claim that the population mean is greater than 74 sec, what does df denote, and what is its value? what does df denote? a. the test statistic b. the sample standard deviation c. the sample size d. the number of degrees of freedom

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?

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.

This graph shows which inequality? a ≤ –3 a > –3 a ≥ –3 a < –3