Central Tendency
"x bar"---sample mean
"x tilde"---population mean
A measure that tells how spread out the numbers in a data set are around the mean.
Standard deviation
A score that indicates what % of the population scored at or below a given number
Percentile
In fahrenheit, at what temperature does water boil?
212 degrees
If no number occurs more than any other in a data set, what can you conclude?
There is no mode
When finding standard deviation, what is the mathematical difference between sample and population data?
Whether to divide by n or n-1.
Describe how to find the 5 numbers that go on a box and whisker plot
Lowest, Quartile 1, Quartile 2, Quartile 3, Highest
What country produces the best coffee in the world?
Brazil
Find the mean, median, and mode:
7 11 8 12 9 11 12 6 10 13
Mean=9.9
Median=10.5
Modes=11 and 12
According to the Emperical Rule, what % of data lies within 2 standard deviations of the mean?
95%
Give the 5 number summary that would go on a box and whisker plot for the following data set:
10 22 30 16 20 11 14 27 24 12 8
8 11 16 24 30
What is alektrophobia? The fear of: eating, music, garlic, chickens, cars, or electricty?
chickens
Find the grouped mean of exhibit A
65
The gas bill for a sample of city residents is $70 with a standard deviation of $8. Between what two values do about 95% of the data lie?
$54 and $86
Find the percentile rank for a test score of 44:
45 25 28 43 36 37 55 51 46 44 48 22 11 16
57th percentile
Give another name for the North Star
Polaris
Find the weighted mean of exhibit B
80
Find the sample standard deviation for the data set:
4 2 8 3 10 9 2 6 1
3.35 (with mean of 5)
If Manny had a z-score of -2.2 on his last test, and the class mean was 78 with a standard deviation of 6, find his score.
64.8
What is the only word in the English language that ends in "mt"?
dreamt