Acivil engineer must design a wheelchair-accessible ramp next to a set of steps leading up to a building. the height from the ground to the top of the stairs is 2 ft. based on ada codes, the slope must be 1: 12 or less. slope is equal to the rise of the ramp divided by the run of the ramp. using the ada code, what is the minimum allowable length of the ramp base?

Researchers pose the question: can shoe size be predicted from a woman's height? a random sample of 18 females and their shoe size versus height (in inches) gives the regression results shown in the table. predictor coeff se coeff t ratio p-value constant -45.74 32.58 -2.57 0.147 height 0.5943 0.2984 1.99 0.042 s = 3.2178 r-sq. = 18.9% r-sq. (adj) = 12.4% is there statistical evidence of a linear relationship between shoe size and height? no, because r2, the coefficient of determination, is too small no, because 0.147 is above any reasonable significance level yes, there is evidence at the 5% significance level yes, because, by any reasonable observation, taller women tend to have a larger shoe size