A regression model was fit to 40 data cases and the resulting sample slope, 1, was 15.5 with a standard error SER, of 3.4. Assume that the conditions for a simple linear mode including normality, are reasonable for this situation. a) Test the hypothesis that B1-0. b) Construct a 95% confidence interval for B1

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.

Extra points! find the missing dimension! need asap

The center on a target has a diameter of 5 inches. the whole target has a diameter of 25 inches. complete the explanation for what part of the whole target is the center. the center of the target takes up % of the whole target.