Reporting on a distribution - Categorical The distribution of 'most common use of wearable technology' is shown in Figure 1. In this sample of 65 STA10003 students, 55.4% reported that they check their step counter first. A similar percentage of students checked either their active minutes [16.9%], or 'other' activities [15.4%]. The remaining students suggested they checked their heart rate in the first instance [12.3%]. Most COMMON use of wearable technology CO 45 Percent 15 10 Step Counter Heart Rate Active Minutes Most COMMON use of wearable technology Other Figure 1: Distribution of most common use of 'wearable' technology KNOW ING 38 Reporting on a distribution- Metric ( Include labelled histogram) · Shape · Approximately symmetric · Positively Skewed · Negatively Skewed · Centre · Symmetric with no outliers - mean and include standard deviation · Skewed or Symmetric with outliers - median · Spread · 'Typical' - Middle 50% [IQR] from Percentiles table · Use 25th and 75th percentiles · Outliers · Any values extremely high / low? State figures and direction
WEEK 4 Revision of week 3 Variability: spread / cluster of values Range : Xmax-Xmin - not reliable measure of variab. [extreme scores Issue] Varience mean of squared deviations PISS [ {] or [S] Ln-I Sum of squares then average Definitional: using deviation scores SS ={(Qc-M)2/E (X-M)2 Computational uses actual scores SS = ( EX)2 -(EX)? or N= Populat size ( X )2 - (Ex)2 n n= Sample Size Standard Denation varience most commonly used measure of variability . Average distance from mean
Reporting on a Single Categorical Variable . Info about variable / sample [ who / size] · What did we find out? Anything else of interest ? Reporting on single Metric variable Shape: Approximately symmetric · Positively Skewed . Negatively skewed Centre Symmetric -No outliers - Mean and include standard deviat . · Skewed, outliers - Median Spread Typical -middle 50% 25th and 75th percentiles from percentile table] Outliers · any values extremely high / low? - state figures and direction -