DC CAPE Algebra I Statistics and Probability. Practice it free.

A stone is thrown upward from the edge of a cliff overlooking a valley. The equation $s = -5t^2 + 11t + 16$ models the stone's height $s$, in meters, above the valley floor $t$ seconds after it is thrown. According to the equation, what is the height, in meters, of the cliff edge above the valley floor?

Four small data sets are listed below. Which set has the least standard deviation?

Set A: $7, 9, 11, 13$
Set B: $8, 10, 10, 12$
Set C: $5, 10, 10, 15$
Set D: $6, 9, 11, 14$

The distances, in miles, run on seven days are $6\textsf{,}$ $8\textsf{,}$ $12\textsf{,}$ $9\textsf{,}$ $14\textsf{,}$ $7\textsf{,}$ and $14\textsf{.}$ Which data set has the same mean?

Five afternoon temperatures, in degrees Fahrenheit, are $64\textsf{,}$ $78\textsf{,}$ $72\textsf{,}$ $60\textsf{,}$ and $66\textsf{.}$ Which data set has the same median?

On four science quizzes, Priya earned scores of $85$, $92$, $78$, and $88$. On a fifth quiz, her score was $x$. The mean score on all five quizzes is $87$. What is the value of $x$?

A box plot summarizes the data 2, 4, 5, 7, 9, 11, 13. Find the minimum.

For a normal distribution, approximately what percent of data lies within 2 standard deviations of the mean? (Use the empirical rule; enter the number of percent.)

A coach records the goals her team scored in seven games: $1, 3, 2, 3, 0, 3, 2$. What is the mode of the data?