Froggy Jumps Percentiles for Ungrouped DataOnline version Quiz on raw data percentiles by Karylle Lucapa 1 In the dataset (2,4,6,8,10,12,14,16,18), what is the 50th percentile using r = p(n+1)/100? a 8 b 10 c 12 2 Using the same dataset, what is the 25th percentile (r = 2.5)? a 5 b 6 c 4 3 Using the same dataset, what is the 75th percentile (r = 7.5)? a 13 b 14 c 15 4 Definition: the p-th percentile is the value below which what proportion of data fall? a 100 minus p percent b p/2 percent c p percent 5 What is an ungrouped data percentile often used to measure in a dataset? a Data frequency b Relative position of a value c Group width 6 If a dataset has 9 values, what is the rank r for the 30th percentile using r = p(n+1)/100? a 4 b 2 c 3 7 Which method is commonly used to estimate percentiles in ungrouped data with interpolation? a Mean of all values b Mode of the dataset c Linear interpolation between adjacent ranks 8 In a sorted dataset, the 100th percentile equals what? a Maximum value b Minimum value c Median 9 For ungrouped data, percentile calculation relies on the order of values rather than their: a Magnitude b Frequency c Sign 10 True or false: Percentiles are sensitive to outliers in ungrouped data. a False b Sometimes true c True
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