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60 Cards in this Set

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67, 90, 80, 100, 84, 92, 100, and 78

Find Q1 and Q3 by hand
(1)find mediain to find the lower and upper half
(2)Q1= 79 and Q3= 96
How do u find Q1 by hand?
find the median of the lower half of the data
How would you find Q3 by hand?
find the the medain of the upper half
What does dispension refer to?
the spread
NAME
this refers to the spread
dispension
What does the dispension measure?
(1)the spread of the data around the measures of the central tendency
NAME
this measures the spread of the data around the measures of the central tendency
dispension
What is the symbol for sample variance?
s^2
What does s^2 stand for?
the sample variance
What are the (5)parts that make up the dispension?
(1)s^2 (2)S (3)σ^2 (4)σ (5)range
What does S stand for?
sample standard deviation
NAME
this stands for sample standard deviation
S
What does the symbol σ^2 stand for?
population varaince
NAME
this symbol represents the the population variance
σ^2
What does the symbol σ stand for?
the population standard deviation
NAME
this symbol represents the population deviation
σ
What is the range?
is the highest minus the lowest
What is the purpose of the standard deviation?
to measure how much each observation is above or below the mean
NAME
this measures how much each observation is above or below the mean
standard deviation
The standard deviation measures how much each observations is above or below the (1)
mean
The stanard deviation measures how much each observations is (1)the mean
above or below the
Given that the mean is 80 and the S is 5. what would be A and C on the graph bewlow

----------------
A 80 B C
A= 75
C=90
How do you find the s^2 by hand?
(∑ (x-mean)^2)/(n-1)
0, 2,4, 3, and 6

Find s^2 by hand.
(∑ (x-mean)^2)/(n-1)

s^2=5
How do you find the σ by hand?
√ ((∑x-u)^2)/(n-1))
How do you find the the σ^2 by hand?
((∑x-u)^2)/(n-1))
What does u the greek symbol in stats represent?
the mean of the population
NAME
this greek symbol in stats represents the mean of a population
u
The normal curve can be also be called (1)
bell curve or bell shaped symmetric distribution
the (1)normal curve can also be called the bell curve or symmetric distribution
normal curve
Using Graph 21,

(1)what is the freq about region A?

(low, med, or high)
low
Using graph 21,

(1)what are observations you can make about region A?

(low, med, or high)
low
Using graph 21,

(1)what is the frequency about region B?
(low, med, or high)
(low, med, or high)
high
Using graph 21,
(1)what are observations you can make up region B?
(low, med, or high)q
med
Using graph 21,
(1)What is the frequency of region C?

(low, med, or high)
low
Using graph 21,
(1)what are some observations taht you can make about C?
(low, med, or high)
high
What is normal distribution used for?
mumerical data that is continous
What type of data is the normal distrubtion of data suitable for?
for data that is numerical and continous
STATE WHETHER DATA IS SUITABLE FOR BELL CURVE (NORMAL DISTRUBTION)

grades
yes
STATE WHETHER DATA IS SUITABLE FOR BELL CURVE (NORMAL DISTRUBTION)

income
yes
STATE WHETHER DATA IS SUITABLE FOR BELL CURVE (NORMAL DISTRUBTION)

list of people heights
yes
STATE WHETHER DATA IS SUITABLE FOR BELL CURVE (NORMAL DISTRUBTION)

weight
yes
STATE WHETHER DATA IS SUITABLE FOR BELL CURVE (NORMAL DISTRUBTION)

number of traffic accidents
no
STATE WHETHER DATA IS SUITABLE FOR BELL CURVE (NORMAL DISTRUBTION)

number of bad checks written at walmart
no
STATE WHETHER DATA IS SUITABLE FOR BELL CURVE (NORMAL DISTRUBTION)

number of babies born at a hosiptal
no
Use graph 22,
(1)if you where given the standard deviation how do you find out the spread of data that falls into the C-D range?
mean +/- s
Using graph 22,

(1)how do you find out the spread of data that falls into the B to E range?
mean +/ s
Using graph 22,
(1)how do you find out the spread of data that falls into the A-F range?
mean +/- s
What is the imperical rule?
68-95-99 rule
Using graph 22,
(1)Given that the s is 5, what is the range of data starting from C to D?
75 to 80
If the distrubtion is normal then (1)
the mean and the mode are equal
If the distrubtion is (1)then the mean and the mode are the same
normal
Using graph 22,
What was the score of students who scored in the 68% range?
mean+/-5= 75 to 85
Using graph 23,

What was the score of students who scored in the 95% range?
80+/-2(5)= 70 to 90
Using graph 22,
what was the score of students who scored in the 99% range?
mean +/-3s

80+/-15 = 65 to 95
Using graph 24,

(1)tell what the distrubtion is?
(2)Tell what the lables on the graph are
(3)using your answers to the above, fill in the blanks
A(a)B(b)C

(<,>)
(1)skewd to the right
(2)A= mode
B= median
C= mean
(3)mode< median<mean
Using graph 25
(1)tell what the distrubtion is?
(2)Tell what the lables on the graph are
(3)Using your answers from above, fill in the blanks

A (a)B (b)C

(<,>)
(1)skewed to the left
(2)A= mean
B=median
C=mode
(3)mean>median>mode
Using graph 26
(1)tell what the distrubtion is?
(2)Tell what the lables on the graph are
(3)Using your answers from above, fill in the blanks

A (a)A (b)A

(<,>)
(1)symmetric
(2)A= mean, mode, and median
(3)they are all equal
Using graph 27,
describe the distrubtion
symmetric
Using graph 28,
describe the distrubtion
symmetric