An experiment was performed upon rats to investigate the effect of ingesting Alar (a chemical sprayed on apple trees to keep fruit from dropping before ripe) upon subsequent cancer rates.

The following variables were measured:

gender (0=female, 1=male); weight (g); dose of Alar (nil, low, high); and number of tumors.

Which of the following is FALSE?

A) Gender is categorical; dose is ordinal

B) Gender is discrete; weight is continuous

C) Number of tumors is categorical

D) Dose is discrete

E) Weight is continuous

Option C and D are false

Step-by-step explanation:

All the mentioned option are correct in the given scenario except option C and D.

The reason is that dose is categorized as nil, low and high so, dose is categorical variable. Also, number of tumors is quantitative variable because it can be meaningfully interpreted in numerical form. The number if tumors is discrete quantitative variable.

Now consider all options

A) Gender is categorical; dose is ordinal

This option is true because gender can be categorized into male and female and also dose is ordinal because it has order i. e. nil, low and high.

B) Gender is discrete; weight is continuous

This option is false because gender can be a discrete variable and weight is continuous variable because it is measurable. So, the statement is true.

Option C and D are already discussed an option E is discussed in option B.