stat

CUSS?

Answer explanation

Center- Mean median

Unusual Features- Gaps, Clusters, Outliers

Shape- Skewed?. Symmetric, Uniform, Bi-modal

Spread- Range (Is it small or big)

For left skewed which is greater mean or median

• median

• mean

Answer explanation

The median is always closer to the tail

Which is the outlier method

• Q3+1.5*IQR

  Q1-1.5*IQR

• Q3-1.5*IQR

  Q1+1.5*IQR

• Q3*1.5-IQR

  Q1*1.5-IQR

• Q3*1.5-IQR

An outlier is a value that is located 2 or more standard deviations above or below the mean

(a)  

What is not affected by adding and subtracting

• Q1

• range

• mean

• IQR

What is affected when you multiply or divide your data

• IQR

• Mean

• Median

• Standard devation

Box plot right more spread out

• right skewed

• left skewed

Empirical rule

• 68,95,99.4

• 68,95,99.6

• 68,95,99.7

• 68,95,99.8

whats a z score

Answer explanation

The amount of standard deviations away from the mean. given-mean/SD

What would you use to find a certain probability on the normal curve where mean=0 and SD=1

• normalcdf

• invnorm

• binompdf