UCF QMB3200 FINAL PT.3 Questions with
Correct Answers
Null Hypothesis ($H_0$)
A statement of 'no change' or 'no effect.'
Variables ($X$ vs. $Y$)
$X$ is the Independent variable (the predictor); $Y$ is the Dependent variable (the outcome).
Coefficient of Determination ($r^2$)
Measures the proportion of variability in $Y$ explained by $X$.
Test Statistic
A value calculated from sample data used to decide whether to reject the null hypothesis.
Scatter Diagram
A visual display of the relationship between $x$ (horizontal axis) and $y$ (vertical axis).
Matched Samples (Definition)
Samples where each data value in one sample is paired with a corresponding value in the
other.
Matched Sample (Benefit)
Used to reduce variance by comparing 'apples to apples.'
Random Sample
A sample where every element in the population has an equal chance of being selected.
Sampling Distribution
Correct Answers
Null Hypothesis ($H_0$)
A statement of 'no change' or 'no effect.'
Variables ($X$ vs. $Y$)
$X$ is the Independent variable (the predictor); $Y$ is the Dependent variable (the outcome).
Coefficient of Determination ($r^2$)
Measures the proportion of variability in $Y$ explained by $X$.
Test Statistic
A value calculated from sample data used to decide whether to reject the null hypothesis.
Scatter Diagram
A visual display of the relationship between $x$ (horizontal axis) and $y$ (vertical axis).
Matched Samples (Definition)
Samples where each data value in one sample is paired with a corresponding value in the
other.
Matched Sample (Benefit)
Used to reduce variance by comparing 'apples to apples.'
Random Sample
A sample where every element in the population has an equal chance of being selected.
Sampling Distribution
