Mean, Medium, Mode
What is the symbol of mean
u or x
a
Where is mean of Bell curve
top of the curve
What is the Area Under the Normal Curve when Z-score is 1.51
0.9345
Capitol of Japan
A set of data have number “2,3,4,5,6,7,7,8”. What is its medium
5.5
What is standard deviation
It is a measure that describes the variation, or spread, between the data values and the mean of the data
where can we find 50% on the Bell curve
Left and right side of the mean point
What Z-score value has 95%of area below the curve?
1.64
How many continents are there?
7
A set of data “2,8,9,X,17,29,30” has a mean 15, What is the value of X
10
How to calculate the standard deviation
a =
How to write 97.72% on the Bell curve using symbol u and a
u + 2a
What is the Area under the Curve when Z-score is greater than -1.83 but smaller than 2.65
0.9629
What force keeps planets in orbit?
Gravity
2,5,4,3,6,67,4,3,6,24
What is the mode
No mode
A set of data [15,20,34,56,70], what is its average and its stand deviation? Calculate without calculator.
mean=39
a=21
What is z-scores
use to determine the percentage
IQ mean = 100, SD = 15. What IQ corresponds to the 90th percentile?
IQ mean 100, SD 15, 90th percentile (Z\approx1.28) → IQ ≈ 119
A box has 3 red, 4 blue, 5 green balls. Probability of blue?
1/3
A set of data has a data{0-10: 3 times, 11-20: 5 times, 21-30: 6 times, 31-40: 2 times}What is the possible medium value RANGE
11-20
A frequency table {0:5, 1:10, 2:4, 3:3, 4:1} calculate its standard deviation
A = 1.1
Calculate Z score if the data has a mean of 20, value of 18, standard deviation Of 4
SAT scores (mean = 1050, SD = 200). What score is at Z = -0.80?
SAT mean 1050, SD 200, Z=-0.80 → Score = 890
Alpha Shift:
Shift every letter in “FUTURE” back by 1 (A→Z wrap). What word?
E T T U Q D → “ETTUQD” — shifting back: F→E, U→T, T→T, U→T, R→Q, E→D.