Hello, my wonderful mathlings! Please be sure to review the following concepts for Wednesdays's quiz:
I. Graphing
A. Intervals
1. Intervals should be even (count if you need to)
2. Intervals are usually on the y-axis or are the first category in a frequency chart
3. Think of intervals as "categories"
B. Labels
1. Your graphs should always have a title that pertains to the information being represented by
the graph
2. Your x-axis and y-axis should both have labels, even if the information on the graph seems
obvious
C. Accuracy
1. Always re-check your data after you've made your graph
II. Measures of Central Tendency
A. Mean: (average) - add ALL the data, and then divide by how many data points you have
B. Median: FIRST, line up all the data from LEAST to GREATEST; then, find the middle number.
If there are two middle numbers, find the MEAN of the two middle numbers for your median.
C. Mode: number that appears the MOST
D. Range: highest data point minus the lowest data point
III. Drawing conclusions
A. Real-world connections - be sure to think about the data in a real-world setting and be sure that
your conclusions are realistic
B. Comparisons - when asked to compare data, think about how many TIMES greater one statistic
is than another, rather than how "much" more
C. We will focus on this part heavily on the quiz. Please use complete sentences and proofread your
answers
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