Vocabulary
What is a population?
All people of interest
What is the formula for range?
Maximum score-minimum score +1
What is the range of this data set?
6, 16, 4, 27, 8, 3
25
What is a duel between three people called?
A truel
How many test will you have in this class?
Three tests and a cumulative final
What is a statistic?
Numerical Value that describes a sample
How is variance different than standard deviation?
Variance is standard deviation squared
What is the median of this data set?
10, 36, 4, 37, 55, 22, 7, 8, 17
17
What is the rarest M&M color?
Brown
What is the difference between a grouped frequency distribution and an ungrouped frequency distributions?
Grouped: contain an interval of numbers of numbers in each category
Ungrouped: only one raw score for each row
Which scale of measurement effectively designates rank among categories?
Ordinal
What is the formula for the mean of a population?
Population mean (Mu)= The sum of all of your scores divided by the total number of scores (N)
Solve the summation notation problem with this data set:
4, 8, 12, 5, 16
( Σx )^2
2025
What are the names of Cinderella’s stepsisters?
Anastasia and Drizella
How long is New Zealand’s Ninety Mile Beach?
55 miles
Describe the difference between a percentile and a percentile rank.
Percentile: Raw score/percentage
Percentile Rank: Percentage of score in a reference group less than or equal to that score (cumulative percent)
How do you calculate cumulative proportion?
cp=cf/n
What is the mean of this data set?
5, 3, 4, 1, 5, 8, 2
4
Which is the only edible food that never goes bad?
Honey
How do you calculate a median with repeated numbers? (ie. 1, 4, 5, 6, 6, 6, 6, 6, 6, 6, 7, 11, 18)
lower interval limit + number of repeated median score values below apparent median/ total number of repeating score values in the interval
What is the definition of leptokurtic?
A type of kurtosis that has a high peak and, therefore, less variability
What is the formula for the standard deviation of a sample?
S= the square root of the sum of x minus the mean (M) squared divided by n-1
Find the standard deviation of this data set:
12, 2, 6, 4
4.32
What is the most frequently sold item at Walmart?
Bananas
When was UTSA established?
June 5, 1969