Exam Questions and Answers for Statistics Module 1 Already Passed

Exam Questions and Answers for Statistics Module 1 Already Passed variable - Answers holds information about the same characteristic for many subjects categorical variable - Answers where the data collected places the individuals in various categories or groups quantitative variable - Answers where the data collected is numerical and it makes sense to use it for numerical operations frequency table - Answers lists the categories for a categorical variable and displays the counts for each category relative frequency table - Answers lists the categories for a categorical variable and displays the percenatges for each category distribution - Answers describes how a quantitative variable behaves. Generally include shape, center, spread, & unusual features. bar chart - Answers a display for categorical data that uses bar height to represent counts or percentages for each category histogram - Answers a display for quantitative data that uses adjacent bars to represent counts or percentages of values falling in each interval stem & leaf or stemplot - Answers a display for quantitative data that uses place values to reprensent the distributions dotplot - Answers a display for either kind of data that uses a dot to represent each individual in the data set measures of center - Answers mean for distributions that are symmetric, median for all other distribution shapes measures of spread - Answers standard deviation for distributions that are symmetric, IQR for all other distribution shapes uniform distribution - Answers a distribution whose shape is evenly distributed throughout the values it takes symmetric distribution - Answers a distribution whose shape is unimodal and each side is roughly a mirror image of the other left skewed distribution - Answers a distribution that has a concentration of data on the upper end and the tail on the left right skewed distribution - Answers a distribution with a concentration of data on the lower end and the tail on the right outliers - Answers values that fall outside the overall pattern of the data mean - Answers the average of the data values median - Answers the value in the center of an ordered data set range - Answers the maximum data value minus the minimum data value first quartile - Answers the value where 25 % of the data fall below it in an ordered list third quartile - Answers the value where 75% of the data falls below it in an ordered list Interquartile Range (IQR) - Answers the third quartile minus the first quartile percentile - Answers the place in the data where a certain percentage of the data falls below that value 5 number summary - Answers includes the minimum, first quartile, median, third quartile, & the maximum modified boxplot - Answers a display for quantitative data that graphs the five-number summary on an axis and shows outliers of they exist variance - Answers the standard deviation squared, it is a measure of spread advantage of stemplot - Answers retains the actual data values from the data set advantage of histogram - Answers easy to see shape of distribution & good for large data sets resistant - Answers values that are not strongly affected by extreme values, the median is more resistant that the mean. The standard deviation is most strongly affected by extreme values Mode - Answers the most frequently occurring score(s) in a distribution normal distribution - Answers a bell-shaped curve, describing the spread of a characteristic throughout a population uniform distribution - Answers the frequency of each value of the variable is evenly spread out across the values of the variable bimodal distribution - Answers a distribution with two modes Parameter - Answers numerical summary of a population Population - Answers A group of individuals in the same category empirical rule - Answers approximate % of observations w/in 1 standard deviation (68%), 2