What are the other numbers' questions?
Answer:
a. <em>Independent - </em>age; <em>Dependent - </em>intelligence
b. Cross-sectional
Explanation:
Scientific experiments label the variables that they employ in two ways: dependent and independent. Independent variables are those that are changed or manipulated by the researchers. In this case, the researchers are exercising control over the variable of age by selecting a particular type of people. This also means that the researchers believe this variable to have a direct effect on the dependent variable.
On the other hand, dependent variable refers to the variable being tested and measured. It receives this name because the variable is "dependent" on the independent variable. In this case, intelligence is the variable that is believed to depend on age.
Finally, this is also an example of a cross-sectional study. Cross-sectional studies interview different samples of people at a particular point in time. This allows us to have a snapshot of a group at a particular moment. This is different from longitudinal studies, which follow the same sample of people over a long period of time.
The probability <em>that </em><em>both students</em><em> are </em><em>girls i</em><em>s </em><em>0.28</em>
Probability is the likelihood or chance that an event will occur
Probability = n(E)/n(S)
where:
- n(E) is the number of events
- n(S) is the total sample space:
If Mrs. Chavis's statistics class has 26 students in it, then n(S) = 26
Since three are 14 girls in it, hence n(E) = 14
Pr(both students are girls) = 14/26 * 13/25 (without replacement)
Pr(both students are girls) = 182/650
Pr(both students are girls) = 0.28
Hence the probability <em>that </em><em>both students</em><em> are </em><em>girls i</em><em>s </em><em>0.28</em>
Complete question.
<em>Mrs. Chavis's statistics class has 26 students in it, 14 girls and 12 boys. She uses a calculator to select two students at random to solve a problem on the board. What is the probability that both students are girls?</em>
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Learn more on probability here: brainly.com/question/24756209
