1.3: Frequency- Distributions & Normal Distribution ✅ Flashcards
1
Q
What do we use to describe a histogram pattern?
A
Shape
Centre
Spread
2
Q
Skew
A
Positively skewed= to the left (most at left)
Negatively skewed= to the right (most at right)
3
Q
Outliers
A
Lie outside the normal pattern
4
Q
What should you always use to check the distribution of numeric variables?
A
Histograms or a box-plot
5
Q
What type of variables can the mean be used for?
A
Normally distributed with no outlier (unless its a large sample size)
-as mean is affected by skewness
Same with SD
6
Q
Non-normal distribution use?
A
Median and interquartile range
7
Q
Mean simple
A
Micro
8
Q
SD symbol
A
σ
9
Q
68% of values
A
Mean + 1SD
Mean - 1SD
10
Q
95% of values in the sample
A
Mean + 1.96SD
Mean - 1.96SD
