Digital SAT Practice Questions
Access 462 official-caliber practice questions. Filter by subject or difficulty to pinpoint your cognitive blind spots.
On a scatterplot, if all data points lie exactly along the line $y = -3x + 8$, what is the correlation coefficient $r$?...
A scatter plot shows a correlation coefficient of $r = 0.85$. How is this relationship best characterized?...
In a linear regression model $\text{Salary} = 1,500(\text{Years}) + 38,000$, what does the value 38,000 mean?...
A scatterplot compares study time (hours) to test score. The line of best fit is $y = 6.5x + 45$. What score is predicted for 8 hours of study?...
If the residual for a data point $(5, 68)$ relative to line $\hat{y} = 10x + 12$ is evaluated, what is its value?...
Which of the following correlation coefficients indicates the weakest linear association?...
A poll with a 95% confidence level reports candidate support at $48\% \pm 4\%$. Does this result guarantee that the candidate will receive less than 50%?...
In an experiment testing fertilizer on plant growth, why is a control group necessary?...
A data set has outliers in the upper tail (positively skewed). How do the mean and median compare?...
A medical trial uses a double-blind design. What does this mean?...
What is the median of the following set: {14, 18, 22, 26, 30, 34}?...
If each number in a dataset is multiplied by 3, what happens to the variance?...
A researcher finds that ice cream sales and drowning incidents are positively correlated. What best explains this finding?...
Circle equation $(x - 3)^2 + (y + 5)^2 = 49$ has its center and radius given by:...
Equation $x^2 + y^2 - 6x + 8y = 0$ represents a circle. What is the radius of this circle?...
A circle in the $xy$-plane has diameter with endpoints $(1, 2)$ and $(7, 10)$. What is the area of the circle?...
Circle $C$ is defined by $(x + 2)^2 + (y - 4)^2 = 36$. Which of the following points lies on circle $C$?...
Point $(a, 3)$ lies on the circle $x^2 + y^2 = 25$. If $a > 0$, what is the value of $a$?...
The circle $(x - 1)^2 + (y + 3)^2 = r^2$ is tangent to the $x$-axis. What is the value of $r$?...
A circle with radius 4 is centered at $(-1, 2)$. What is its standard equation?...
In the equation $x^2 + y^2 + 4x - 10y + c = 0$, the circle has radius 6. What is $c$?...
Circle $O$ has circumference $18\pi$. What is the area of circle $O$?...
The diameter of circle $K$ is 14 cm. What is the length of an arc intercepted by a $60^\circ$ central angle?...
Convert an angle of $150^\circ$ to radians in terms of $\pi$....
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