Question

A. Can herbal supplements reduce the length and severity of the common cold? An experiment administered a cold nasally to 300 paid volunteers. Volunteers received either a 100 milligram dose of an herbal supplement, a 50 milligram dose of the supplement, or a placebo to take two times a day over the next week. Volunteers were evaluated daily by being asked how they felt, and having their sinuses rinsed so that levels of the cold germ could be measured. The researchers found that differences in length and severity of the cold in the different groups were not statistically significant. What was the independent variable in this study? A. How the volunteer's felt B. The amount of cold germs in sinuses C. The placebo D. Supplement treatment

B. How is an ordinal variable more detailed than a nominal variable? A. 0 means the total absence of the variable. B. The categories are qualitative groupings. C. The categories possess value. D.The distance between the categories is equal.

C. How is a ratio variable more detailed than an interval variable? A. 0 means the total absence of the variable. B. The categories are qualitative groupings. C. The categories possess value. D. The distance between the categories is equal.

Answer 1

1.Can herbal supplements reduce the length and severity of the common cold

The amount of cold germs in sinuses because severity of cold can be measured using it

2. How is an ordinal variable more detailed than a nominal variable

The categories possess value.

It is used for measurement that reports the ranking and ordering of the data without actually establishing the degree of variation between them.

3.  How is a ratio variable more detailed than an interval variable

0 means the total absence of the variable

because Ratio scale is a type of variable measurement scale which is quantitative in nature. Ratio scale allows any researcher to compare the intervals or differences.