1What is used to describe Quantitative/Numerical distribution?
Shape, Center, Spread/Variability
2x-bar (x̄) means...
sample mean
3μ (miu) means...
The population mean
4(s) lowercase s means...
The Standard Deviation
5n means...
sample size/number of observations or data values
6Sigma (Σ) means...
The sum
7True or False, Median is not resistant to outliers...
False, median is resistant to outliers
8What are the 2 measures of center?
Mean and Median
10How do you find range?
Max - Min
11True or False, mean is sensitive to outliers...
True, mean is sensitive to outliers
12When there is skewed distribution, what is used to find the spread/variability?
IQR/Quartiles
13What is used to describe/find center? (Quantitative/Numerical distribution)
Mean, Median
14Unimodal means...
Distribution with one prominent mound/peak
15Complete the 5 number rule with the following data set - 34, 67, 103, 22, 21, 70, 54, 21, 90, 20
min: 20, median: 44, Q1: 21, Q3: 70, IQR: 49
16How do we describe or measure shape? (Quantitative/Numerical disribution)
Symmetric, Skewed right, Skewed left,
17When there is symmetric distribution, what is used to find spread/variability?
Standard Deviation
18Explanatory variable
Independent variable, The variable you manage or control that is not affected by any other variables.
19Name the the graphs used for Quantitative/Numerical variables...
Histogram, Stem and leaf plots, Dotplots, Line graphs
20Bimodal means...
Distribution with 2 separated mounds/peaks
21How do you find the IQR
Calculate the difference of Q3 and Q1
22When there is skewed distribution, what is used to find center?
Median
23Response variable
Dependent variable, The variable that researchers are trying to explain or predict.
243 main concepts used to summarize data...
Shape, Center, Spread/Variability
25What are the 3 main types of graphs for displaying quantitative/numerical?
Dotplots, Histograms, Stem and leaf plots
26Name graphs for Qualitative/Categorical data
Pie chart, Bar graph/chart
27What is used to find/calculate the spread/variability (Quantitative/Numerical distribution)
Standard deviation, IQR
28How do you find lower and upper fence?
Q1-1.5(IQR) and Q3+1.5(IQR)
29Empirical rule also known as...
68%-95%-99.7% rule
30Standard/Z score is calculated by...
(observation - mean)/(standard deviation)
31When there is symmetric distribution, what is used to find center?
Mean
32What is the 5 number summary?
Find/calc the min value, median, Q1, Q3 and IQR