Business Statistics Final Ch 4

TRUE or FALSE: standard deviation is not a measure of position

TRUE

What would be an example of good variables to use for a contingency table?

favorite color and gender

If a set of data exhibits positive skewness, then what coefficient would be expected of Pearson's coefficient of skewness?

it should be close to 3; must be between -3 and 3

[o/89-';8u;io[097ljk[luiukh6ugkouu

love that

contingency tables are used for summarizing data of ___ and ___ data

nominal; ordinal

formula for an outlier that <Q3

outlier<Q1 - 1.5 (Q3-Q1)

formula for an outlier that >Q3

outlier>Q3 + 1.5 (Q3-Q1)

when you create a dot plot, you:

pile up dots that are too close to show separately and place a dot along a horizontal scale for each observation

a distribution is negatively skewed if it is___

skewed to the left

a distribution is positively skewed if it is ___

skewed to the right

four commonly-observed shapes of a distribution

symmetric, positively skewed, negatively skewed, and bimodal

symmetric distribution

the mean and median are equal and the data values are evenly spread among these values

in a negatively skewed distribution:

the mean is smaller than the median

to construct a box plot, you need___(5 things)

the minimum value, the first quartile, the median, the second quartile and the maximum value

when a distribution is positively skewed:

the values extend much farther to the right than to the left, the mean is larger than the median

What is the measure of position in which 75% of observation occur?

third quartile