Stats 1.3
Measures of Center
Statistics utility- your graphing calculator with statistical capability or a software
package
Measures of center/central tendency- a statistic describing a typical value of a numerical
data set; including mean, median, mode
M
Stats 1.7
Variance and Standard Deviation
*variance- measure of spread; average of the squared deviation
*standard deviation-measure of spread; the square root of the variance. This is a rough
measure of the average amount the observations deviate from th
Stats 1.5 Histograms
Histogram-Special type of bar graph that displays frequency no space between the bars
Frequency histogram-uses the number of values that fall in each interval
Relative frequency histogram-uses the percent of values that fall in each i
Stats 1.4
Quartiles, Percentiles and Boxplots
Rank-ordered-sequenced in order on some scale
Ascending order- rank-ordered from lowest to highest
Spread- range
Quartile- divides an ordered set into 4 subsets
First (lower) quartile- the median of the number
Statistical Displays
Statistics is the branch of mathematics focused on the collection, analysis and
interpretation of data. From politics to sports to research labs, statistics are used in
virtually every field. During the last 20-30 years, we have seen
Stats 1.2
Stemplots and Dotplots
Stemplot- -a way to organize data numerically
Distribution-a data set
Stem-the first digit(s)
Leaf- 1 digit always!
Maximum- highest value
Minimum- lowest value
Range-highest lowest
Cluster- group of scores close together
Stats
10) Which way is this histogram skewed?
11) If this pie graph represents 300,000 peoples favorite snack foods, how many people have popcorn
as their favorite snack food?
12) Using the following data set, determine the mean, median, mode, Q1, Q3, IQR
Algebra 2 STEM 2nd Semester Midterm Review WS
Topics:
Ch 13/14
*Convert from degrees to radians
*Convert from radians to degrees
*Find values from the unit circle
*6 trigonometric ratios
*Graphing a sine or cosine wave
*Amplitude and period of a sine/cosi
Ch 13/14
1. Determine the values of the six trig ratios.
A
sin A = _
cos A = _ tan A = _
csc A = _ sec A = _ cot A = _
2. Determine the values of the six trig ratios.
sin A = _
7
cos A = _ tan A = _
25
24
csc A = _ sec A = _ cot A = _
3. Convert each meas
Ch 10
14) Find the center and radius of a circle that has a diameter with endpoints at (5, 4) and (0, -6).
15) Write the equation of the circle with center (-2,5 ) and radius 4.
16) Write the equation of the circle with center (1, 4) and containing the po