1-Consider two separate groups of people who had their body fatness measured. Th
ID: 3150951 • Letter: 1
Question
1-Consider two separate groups of people who had their body fatness measured. The mean and standard deviation for groups 1 and 2 were 37.4% ± 4 % and 38.2% ± 7%, respectively. The spread of scores is:
Greater in group 1
Greater in group 2
The same in both groups
Too low
2-
Consider two separate groups of people who had their body fatness measured. The mean and standard deviation for groups 1 and 2 were 37.4% ± 4 % and 38.2% ± 7%, respectively. For group 1, the 4% means:
The body fat measurement is 4% accurate.
68.26% of the % fat values fall between 35.4% and 39.4%.
The group’s % fat did not fall below 4%.
68.26% of the % fat values fall between 33.4% and 41.4%.
3-
Consider two separate groups of people who had their body fatness measured. The mean and standard deviation for groups 1 and 2 were 37.4% ± 4% and 38.2% ± 7%, respectively. If you wanted to determine whether the two groups differed significantly in their % fat, the appropriate statistical test is:
ANOVA
Independent t-test
Dependent t-test
Correlation
Greater in group 1
Greater in group 2
The same in both groups
Too low
2-
Consider two separate groups of people who had their body fatness measured. The mean and standard deviation for groups 1 and 2 were 37.4% ± 4 % and 38.2% ± 7%, respectively. For group 1, the 4% means:
The body fat measurement is 4% accurate.
68.26% of the % fat values fall between 35.4% and 39.4%.
The group’s % fat did not fall below 4%.
68.26% of the % fat values fall between 33.4% and 41.4%.
3-
Consider two separate groups of people who had their body fatness measured. The mean and standard deviation for groups 1 and 2 were 37.4% ± 4% and 38.2% ± 7%, respectively. If you wanted to determine whether the two groups differed significantly in their % fat, the appropriate statistical test is:
ANOVA
Independent t-test
Dependent t-test
Correlation
Explanation / Answer
1) As per the given data information, the spread of scores for first group is (37.4% ± 4 %), that is, (33.4%, 41.4%) and the spread of scores for first group is (38.2% ± 7%), that is, (31.2%, 45.2%).
Clearly, the spread of scores is:
Greater in group 2
2) For group 1, the 4% means:
68.26% of the % fat values fall between 33.4% and 41.4% as per the emipirical rule.
3) If you wanted to determine whether the two groups differed significantly in their % fat, the appropriate statistical test is:
Dependent t-test to test the difference in means for two samples.
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