Can I get a Z-score?
Find the Mean & Median
Standard Deviations
Math Theory?
Random Trivia
100
The z-score used to calculate the 90th percentile is... a. 3.32 b. -1.28 c. 1.28 d. 2.13
c. 1.28
100
Find the mean of this data. 12 14 745 46 5 7 76 46 35
Mean=109.55556
100
Calculate the standard deviation for this set of data: 51 12 56 85 48 52 68 42 35 85 87 73
22.79088
100
The mean for actual observed data is ... a) x-bar b) x c) sigma d) mu
a) x-bar.
100
The square root of 12,345,678,987,654,321 is...
111,111,111
200
Each year, a national achievement test is administered to 3rd graders. The test has a mean score of 100 and a standard deviation of 15. If Jane's z-score is 1.20, what was her score on the test? (A) 82 (B) 88 (C) 100 (D) 112 (E) 118
E.
200
Calculate the standard deviation for this set of data. 654 357 915 543 253 543 951 841 875
253.36655
200
The mean of a population is called this... a. x b. x-bar c. mu
What is Mu.
200
What was the original color of Coca Cola?
Green.
300
A z-score is...
A standardization of a number.
300
You took the SAT and scored a 520 in Math. The national mean Math section SAT score is 480. The standard deviation is 7. Approximately how many standard deviations from the mean did you score?
What is 6. (5.7 rounded up)
300
The area under a ______ _____ is equal to 1. a. symmetric curve b. normal approximation c. density curve
c. density curve
300
This is the percentage of North America that is considered wilderness.
What is 38%.
400
If you make $7.25 per hour at a place where the mean wage is $10.50, and the standard deviation is equal to $1.20, how many standard deviations away from the mean is your hourly wage?
2.7 standard deviations.
400
This percentage of African land is considered wilderness. a. 43% b. 28% c. 64% d. 72%
b. 28%
500
Every year, 50,000 runners compete in the Peachtree Road Race. They run 10 kilometers (a little over 6 miles). The average finishing time is 55 minutes, with a standard deviation of 10 minutes. Fred and Wilma completed the race in 61 and 51 minutes, respectively. Barney and Betty had finishing times with z-scores of -0.3 and 0.7, respectively. List the runners in order, starting with the fastest runner and ending with the slowest runner. (A) Wilma, Barney, Fred, Betty (B) Barney, Wilma, Fred, Betty (C) Wilman, Barney, Betty, Fred (D) Betty, Fred, Barney, Wilma (E) None of the above
A
500
The mean salary for basketball players in the NBA in 2000 was 2.1 million, with a standard deviation of 1.2 million. If your salary as an NBA player, in the same year, was 5.7 million, how many standard deviations away from the mean was your salary?
3 standard deviations.
500
Bimodal data is when...
a graph has two peaks.
500
The volcano that recently erupted in Europe and caused massive airline cancellations and delays.
Eyjafjallajökull.
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