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60 Cards in this Set
- Front
- Back
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 |
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How do u find Q1 by hand?
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find the median of the lower half of the data
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How would you find Q3 by hand?
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find the the medain of the upper half
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What does dispension refer to?
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the spread
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NAME
this refers to the spread |
dispension
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What does the dispension measure?
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(1)the spread of the data around the measures of the central tendency
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NAME
this measures the spread of the data around the measures of the central tendency |
dispension
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What is the symbol for sample variance?
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s^2
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What does s^2 stand for?
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the sample variance
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What are the (5)parts that make up the dispension?
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(1)s^2 (2)S (3)σ^2 (4)σ (5)range
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What does S stand for?
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sample standard deviation
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NAME
this stands for sample standard deviation |
S
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What does the symbol σ^2 stand for?
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population varaince
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NAME
this symbol represents the the population variance |
σ^2
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What does the symbol σ stand for?
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the population standard deviation
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NAME
this symbol represents the population deviation |
σ
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What is the range?
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is the highest minus the lowest
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What is the purpose of the standard deviation?
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to measure how much each observation is above or below the mean
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NAME
this measures how much each observation is above or below the mean |
standard deviation
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The standard deviation measures how much each observations is above or below the (1)
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mean
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The stanard deviation measures how much each observations is (1)the mean
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above or below the
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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 |
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How do you find the s^2 by hand?
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(∑ (x-mean)^2)/(n-1)
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0, 2,4, 3, and 6
Find s^2 by hand. |
(∑ (x-mean)^2)/(n-1)
s^2=5 |
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How do you find the σ by hand?
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√ ((∑x-u)^2)/(n-1))
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How do you find the the σ^2 by hand?
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((∑x-u)^2)/(n-1))
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What does u the greek symbol in stats represent?
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the mean of the population
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NAME
this greek symbol in stats represents the mean of a population |
u
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The normal curve can be also be called (1)
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bell curve or bell shaped symmetric distribution
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the (1)normal curve can also be called the bell curve or symmetric distribution
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normal curve
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Using Graph 21,
(1)what is the freq about region A? (low, med, or high) |
low
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Using graph 21,
(1)what are observations you can make about region A? (low, med, or high) |
low
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Using graph 21,
(1)what is the frequency about region B? (low, med, or high) (low, med, or high) |
high
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Using graph 21,
(1)what are observations you can make up region B? (low, med, or high)q |
med
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Using graph 21,
(1)What is the frequency of region C? (low, med, or high) |
low
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Using graph 21,
(1)what are some observations taht you can make about C? (low, med, or high) |
high
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What is normal distribution used for?
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mumerical data that is continous
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What type of data is the normal distrubtion of data suitable for?
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for data that is numerical and continous
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STATE WHETHER DATA IS SUITABLE FOR BELL CURVE (NORMAL DISTRUBTION)
grades |
yes
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STATE WHETHER DATA IS SUITABLE FOR BELL CURVE (NORMAL DISTRUBTION)
income |
yes
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STATE WHETHER DATA IS SUITABLE FOR BELL CURVE (NORMAL DISTRUBTION)
list of people heights |
yes
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STATE WHETHER DATA IS SUITABLE FOR BELL CURVE (NORMAL DISTRUBTION)
weight |
yes
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STATE WHETHER DATA IS SUITABLE FOR BELL CURVE (NORMAL DISTRUBTION)
number of traffic accidents |
no
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STATE WHETHER DATA IS SUITABLE FOR BELL CURVE (NORMAL DISTRUBTION)
number of bad checks written at walmart |
no
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STATE WHETHER DATA IS SUITABLE FOR BELL CURVE (NORMAL DISTRUBTION)
number of babies born at a hosiptal |
no
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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
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Using graph 22,
(1)how do you find out the spread of data that falls into the B to E range? |
mean +/ s
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Using graph 22,
(1)how do you find out the spread of data that falls into the A-F range? |
mean +/- s
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What is the imperical rule?
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68-95-99 rule
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Using graph 22,
(1)Given that the s is 5, what is the range of data starting from C to D? |
75 to 80
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If the distrubtion is normal then (1)
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the mean and the mode are equal
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If the distrubtion is (1)then the mean and the mode are the same
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normal
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Using graph 22,
What was the score of students who scored in the 68% range? |
mean+/-5= 75 to 85
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Using graph 23,
What was the score of students who scored in the 95% range? |
80+/-2(5)= 70 to 90
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Using graph 22,
what was the score of students who scored in the 99% range? |
mean +/-3s
80+/-15 = 65 to 95 |
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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 |
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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 |
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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 |
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Using graph 27,
describe the distrubtion |
symmetric
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Using graph 28,
describe the distrubtion |
symmetric
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