Question

#2

A researcher is interested in whether the variation in the size of human beings is proportional throughout each part of the human. To partly answer this question he looked at the correlation between the foot length (in millimeters) and height (in centimeters) of 10 randomly selected adult males. The data is reproduced in the table below. Calculate the correlation coefficient r using a TI-83, TI-83 plus, or TI-84 graphing calculator, rounding your answer to two decimal places.

Foot length (mm)	Height (cm)
287.0	179.4
283.3	188.3
286.4	190.2
275.0	187.9
273.2	176.3
294.2	183.2
278.6	188.0
281.9	185.5
282.7	184.5
293.5	191.7

Provide your answer below:

r = ____

Answer 1

step 1) First turn on diagonastic on

Kyes - 2ND ---- > 0 ( CATALOG ) ---- > using down arrow select " Diagonosticon" -----> Enter ------ > Enter

Step 2) press kay- STAT ---- >> Edit ------>> Enter Enter values of foot lenght in L1 and values of height in L2

Type L1 (1) = 287 Enter then scroll down

Type  L1 (2) = 283.3 Enter

Like this way fill all values of Foot length and height into L1 and L2

Step 3) press key STAT ---->>right arrow ----->> CALC ---> 8LinReg( a+bx) ----->> Enter ------>> Select Xlist : L1 ----->>

Ylist : L2 ----->> calculate

You will see r = 0.3035628849

So, correlation coefficient r = 0.30