MCA High School / MCA EOC Statistics and Probability. Practice it free.

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 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?

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?