Samples
The numbers picked is the lottery
What is a random sample?
Choose political party affiliation
What is characteristic/ nominal data
Data: 5, 10, 15, 20, 25
I am the median.
What is 15?
Outliers can change my value by a lot.
What is the mean.
I am the difference between the maximum and minimum values in a data set.
What is the range?
Approximately 68% of a normal population lies between +/- ___ stDev.
What is 1 stdev
class | frequency
20 - 29 | 5
30 - 39 | 7
I am the number that represents the class boundary between the given classes.
What is 29.5?
Dividing student body into 1st, 2nd, 3rd, and 4th year students, randomly sample a proportion from each year.
What is a stratified sample?
What shoe size are you? 7 , 7 1/2, 8, ect
What is characteristic/ ordinal.
Data: 5, 10, 15, 20, 25
I am the Quartile 1
What is 10?
I am the best measure of center when the data is highly skewed.
What is the median
If the mean is 50 and one standard deviation = 5, then 60 represents?
What is +2 st dev from the mean.
Approximately ___ % of a normal populations lie between +/- 2 Stdev.
What is 95%?
class | frequency
20 - 29 | 5
30 - 39 | 7
I am the value of the cumulative frequency < 40.
What is 12?
Dividing a strawberry field into 20 sub plots, then randomly selection 5. And testing all plant in those 5 plots for mold.
What is a cluster sample?
How many shoes do you own?
What is discrete/ ratio?
Data: 5, 10, 15, 20, 25
I am Quartile 3
What is 20
I am the right most measure of center if the distribution of the data is skewed right.
What is the mean.
I am the square root of the variance
What is standard deviation?
Given a mean of 100 and a sigma = 15, TI am the approximate percentage of data that are between 70 and 130
What is 95%?
class | frequency
20 - 29 | 5
30 - 39 | 7
I am the class width of this distribution.
What is 10?
Clocking the speed of every 10th driver as they pass by a police car.
What is a systematic sample?
How much does each bear in the sample weight?
What is continuous/ ratio.
If the mean of a set of data = 100, with a stDev = 10, I am the Z -score for x = 80
What number is - 2
I am the average of the min and max of the data set.
What is the mid-range?
I am significant if I am outside +/- ___ stDev
What is 2?
Given mean = 50 and sigma = 10, I am the LL and UL of approximately 99.7% of the data.
What is LL of 20 and UL of 80?
class | frequency
20 - 29 | 5
30 - 39 | 7
I am the midpoint of the 1st class.
What is 24.5?
Divide a population of manatees into male and female, then then randomly sample some from each group.
What is a stratified sample?
In what year was a historical figure born?
Discrete / interval
Given Q1 = 20, Q2 = 40, Q3 = 60, I am an outlier when I am greater than ????
What value is 120?
I am the best measur of center when the data is categorical.
What is the mode?
I am the variable that represents the number of standard deviations from the mean.
What is Z-score.
Given mean of 100, and sigma of 15, I am the approximate % of the population that is less than 115.
what is 84%
class | frequency
20 - 29 | 5
30 - 39 | 7
I am the relative frequency of the first class?
What is 41.66%