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In a box there are two green balls and two red balls. Consider that two balls are randomly selected without replacement. The probability of these two balls having the same color is:

0.667

None of the options is correct

0.333

0.25

0.5

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Consider the histogram depicted below:

Which boxplot depicts the same data as the histogram?

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Consider the research question: “How frequently do adults consume fruits and vegetables?”

A survey asks a random sample of participants to report their daily intake of fruits and vegetables, but some respondents overstate their consumption to appear healthier.

Which type of bias is most likely present?

Selection Bias

Voluntary Response Bias

Non-Response Bias

None of the options is correct

Measurement Error

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Consider the following statements referring to the use of the addition rule and to the use of the multiplication rule in probability theory:

We multiply when we see [K] for independent events;
We add when we see [Y] for mutually exclusive events;
We can still multiply for dependent events when we see [W] but we do so using [Z] probability;

What stands for K, Y , W and Z, respectively?

None in the list

❌

or, and, or, marginal

❌

and, or, or, conditional

❌

and, or, and, conditional

✅

and, or, and, joint

❌

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