Show that at the bottom of a vertical mine shaft dug to
depthd, the measured value of ag will be
ag = ags(1 - d/r),
ags being the surface value. assume thatearth is a
uniform sphere of radius r.

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error