1.consider two separate groups of people who had their body fatness measured. th

Question

1.consider two separate groups of people who had their body fatness measured. the mean and standard deviations for group 1 and 2 were 37.4% + 4% and 38.2% + 7% respectively.                                -                             -
for group 1, the 4% means
a. the body fat measurement is 4% accurate
b. 68.26% of % fat values fall between 35.4 % and 39.4%
c. the group % fat did not fall fall below 4%
d. 68.26% of % fat values fall between 33.4 % and 41.4%

2.
identity the strongest correlation coefficient below
a. -0.93
b.0.90
c.0.87
d.-0.05

Explanation / Answer

1. (d) 68.26% of fat values fall between 33.4 and 41.4 because when mean and sd of fatness ofgroup 1 is given

then we should take 37.4%-4% and 37.4%+4 , that is fat values fall between 33.4% and 41.4% .

2. Ans (b) 0.90 is the strongest correlation coefficient because there is 90% positive correlation as comparing to remaining (a) and (d)

are negative correlation which is not a strong correlation and (c) .87 is lessthan (d) 0.90 hence 0.90 is strongest correlation.

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