More on the Leaning Tower of Pisa. Refer to the previous exercise. (a) In 1918 the lean was 2.9071 meters. (The coded value is 71.) Using the least-squares equation for the years 1975 to 1987, calculate a predicted value for the lean in 1918. (Note that you must use the coded value 18 for year.)

2.9106

Step-by-step explanation:

According to the information of the problem

Year 75   76   77   78    79    80    81      828384858687

Lean 642 644 656  667   673  688 696  698713717725742757

If you use a linear regressor calculator you find that approximately

so you just find  and then the predicted value would be 106mm

therefore the predicted value for the lean in 1918 was 2.9106

since proposition states that a number is greater than 25, if is true then the number must actually be greater than 25.

this implies that all possible options, except 24, can be accepted