Topics N.1-N.7, KK.1-KK.8, and JJ.1-JJ.5 on https://www.ixl.com/math/algebra-1 are good to review for unit 7.
Quiz 7.1 Topics (WS p47-51 and section 4-5 in the textbook)
Quiz 7.1 Topics (WS p47-51 and section 4-5 in the textbook)
- Calculating and analyzing the mean, median, mode, and range of a set of data.
- Creating and describing scatter plots as positive, negative, or no correlation.
- Creating and using dotplots to find measures of central tendency.
- Making generalizations from a set of data.
- Creating lines of fit for data and using them to make predictions.
Unit 7 Vocabulary
- Measures of central tendency – numbers or pieces of data that can represent the whole set of data
- Mean – The sum of the numbers in a set of data divided by the number of items in the data set
- Median – the middle number in a set of data when the data are arranged in numerical order. If the data set has an even number, the median is the mean of the two middle numbers.
- Mode – the number(s) that appear most often in a set of data
- Range (for statistics) – the difference between the greatest and least data values
- Outliers – data that are more than 1.5 times the interquartile range beyond the quartiles
- Dotplot – a type of graphic display used to compare frequency counts within categories or groups
- Box and whisker plot – a diagram that divides a set of data into four parts using the median and quartiles. A box is drawn around the quartile values and whiskers extend from each quartile to the extreme data points.
- Upper quartile – the median of the upper half of a set of data
- Lower quartile – the median of the lower half of a set of data
- Interquartile range – the range of the middle half of a set of data. It is the difference between the upper quartile and the lower quartile.
- Measures of variation – used to describe the distribution of statistical data
- Mean absolute deviation – the average of the absolute values of differences between the mean and each value in a data set. It is used to predict errors and to judge equality.
- Standard deviation – the square root of the variance
- Scatter plot – shows the relationship between a set of data with two variables, graphed as ordered pairs on a coordinate plane
- Positive correlation – in a scatter plot, as x increases, y increases
- Negative correlation – in a scatter plot, as x increases, y decreases
- Residual – the difference between an observed y-value and its predicted y-value on a regression line
- Stem-and-leaf plot – a system used to condense a set of data where the greatest place value of the data forms the stem and the next greatest place value forms the leaves
- Probability – the ratio of the number of favorable equally likely outcomes to the number of possible equally likely outcomes
The review video has a mistake. It should say, "9/200 or 4.5%" as the final answer on #11.
ShowMe Videos for unit 7 are here: http://www.showme.com/course/7787 (The link may work better on some devices than this page.)