Elementary Stats 2.3-2.5 Review

This is a numerical value that indicates how spread out a data set is.

A box-and-whisker plot is a display whose quartiles are _______.

This value gives a truer picture of how much values vary from the mean.

All entries, or classes, have nearly equal frequencies in a _____ distribution.

This is the difference between the largest and smallest values in a data set.

When calculating the variance of a sample of size n, the last step is to divide by ______.

If a data set has a large standard deviation, then most likely the data values are _______.

To calculate standard deviation, find the ________ of the variance.

Population mean is denoted with the symbol _______.

Sometimes when finding mean, some values are given more importance than others in ____ .

When calculating median, the position of the middle value of a data set of size n is found how?

The 1st quartile is found by finding the median of the ______ of the data.

This quartile is the median of the entire data set.

In a normal distribution, 68% of data will fall within ____ standard deviation(s) of the mean.

The 3rd quartile represents which percentile?

The Empirical Rule applies to a frequency distribution that has what shape?

The data set 4 7 2 0 3 5 2 1 7 9 6 has a mode of what?

Standard deviation calculates how far the data values vary from the _______ .

A percentile score of 40% translates into getting 40% of the questions correct.

When a frequency distribution tails off to the right, it is, ___________.

To calculate the interquartile range, use the formula ________.

Sometimes a data set may not have a _______.

To find the median of a data set, first do what?

The symbol 'x bar' is used to denote __________.

Sample standard deviation is denoted with the symbol ____.

 Chebyshev's formula for calculating  % of values within k standard deviations of the mean. 

A data set whose values vary greatly from the mean will have what type of variance?

This is the symbol representing population variance.

Find the median of the data set 2 4 7 9 11 15.

A(n) _________ is a data value that is far removed from other entries in the data set.

If a data set has 199 values, in which position is the median?

This type of frequency distribution forms approximately equal halves when divided vertically.

Refers to the percentage of data values that fall either above or below a certain percentage.

If two entries in a data set occur most often, the data set is ________.

99.7% of data will fall within ___ standard deviations of the mean in a normal distribution.

A data set with 9 values has the median in which position?

The graphing calculator will calculate all the following except ________.

A data set whose values are close to the mean will have a ______ variance.

The value or values that occur most often.

When calculating mean, first _________.

 A normal distribution has a mean of 45 and a std. dev. of 5, 95% of values fall between___.

The Empirical Rule uses the percentages ______________.

The range of the data set 3  6  9  10  14  16   19   20   21  29 is ___________.   

The data set 12 14 16 18 20 22 24 26 has a median of what?