Amanufacturer produces trinkets targeted to weigh 52 g. the weight of the trinkets is known to be normally distributed, but an engineer is concerned that the variation in the produced trinkets is larger than acceptable. in an attempt to estimate the variance, she selects n = 10 trinkets at random and weighs them. the sample yields a sample variance of 4 g2. define 90% ci for the variance.

Given are five observations for two variables, x and y. xi 1 2 3 4 5 yi 3 7 5 11 14 which of the following is a scatter diagrams accurately represents the data? what does the scatter diagram developed in part (a) indicate about the relationship between the two variables? try to approximate the relationship betwen x and y by drawing a straight line through the data. which of the following is a scatter diagrams accurately represents the data? develop the estimated regression equation by computing the values of b 0 and b 1 using equations (14.6) and (14.7) (to 1 decimal). = + x use the estimated regression equation to predict the value of y when x = 4 (to 1 decimal). =