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DAY 3 MIDTERMS > STATS MT > Flashcards

STATS MT Flashcards

1
Q

calculation of probabilities of a population to make prediction and decisions

A

STATISTICS

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2
Q

what does continuous type of data requires

A

NORMAL PROBABILITY DISTRIBUTION

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3
Q

a probability distribution of continuous random variables

A

NORMAL PROBABILITY DISTRIBUTION

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4
Q

what is the shape of distribution curve

A

BELL

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5
Q

where is the relation of curve and center

A

SYMMETRICAL

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6
Q

what coincide at the center

A

MEAN MEDIAN MODE

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7
Q

what flatten out indefinitely along the horizontal axis but never touch

A

TAILS OF THE CURVE

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8
Q

what is the area under the curve

A

ONE

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9
Q

2 factors that affect the normal curve

A

MEAN
STANDARD DEVIATION

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10
Q

shifts the graph of the normal curve to the right or to the left

A

CHANGE OF VALUE OF MEAN

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11
Q

what determines the shape of the graphs

A

STANDARD DEVIATION

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12
Q

when standard deviation is large?

A

NORMAL CURVE IS SHORT AND WIDE

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13
Q

when standard deviation is small?

A

NORMAL CURVE IS TALL AND SKINNIER

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14
Q

a normal probability distribution that has myu equals 0 and standard deviation equals to 1

A

STANDARD NORMAL CURVE

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15
Q

refers to 68-95-99.7 percent

A

EMPERICAL RULE

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16
Q

measure of relative standing

A

Z SCORE

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17
Q

number of standard deviation a given value x is above so below the mean

A

Z SCORE

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18
Q

distance between a given value x and to the mean

A

STANDARD SCORE

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19
Q

useful for comparing observed values

A

STANDARD SCORE

20
Q

if one score is positive and one score is negative

A

ADD SCORES

21
Q

if both score in same direction ( both left / both right )

A

SUBTRACT SCORES

22
Q

positive scores going to the right

A

SUBTRACT 0.5

23
Q

positive scores going to the left

A

ADD 0.5

24
Q

negative scores going to the right

A

ADD 0.5

25
Q

negative scores going to the left

A

SUBTRACT 05

26
Q

cannot be negative

A

AREA

27
Q

atleast

A

GOING TO THE RIGHT

28
Q

at most

A

GOING TO THE LEFT

29
Q

above

A

GOING TO THE RIGHT

30
Q

below

A

GOING TO THE LEFT

31
Q

to get z score

A

X MINUS µ over standard deviation

32
Q

to get x

A

STANDARD DEVIATION TIMES Z PLUS µ

33
Q

to get µ

A

X MINUS STANDARD DEVIATION TIMES Z

34
Q

to get standard deviation

A

X MINUS µ OVER Z

35
Q

indicates the score or the observed score is above the mean

A

POSITIVE Z SCORE

36
Q

indicates the score or the observed score is below the mean

A

NEGATIVE Z SCORE

37
Q

set of all possible values of a variable

A

POPULATION

38
Q

consists of one or more data drawn from the population

A

SAMPLE

39
Q

a sampling method of choosing representatives from the population wherein every sample has an equal chance of being selected

A

RANDOM SAMPLING

40
Q

most basic random sampling wherein each eelemnt in the population has an equal probability of being selected

A

SIMPLE RANDOM SAMPLING

41
Q

done by lisitng all the elements in the population and selecting every nth element in your population list

A

SYSTEMATIC RANDOM SAMPLING

42
Q

population is divided into different strata or divisions

A

STRATIFIED RANDOM SAMPLING

43
Q

wherein each population is divided into clusters or groups and then randomly sleected

A

CLUSTER SAMPLING

44
Q

measurement of quantity that describes the population

A

PARAMETER

45
Q

the measurement of quantity that describes the sample

A

STATISTIC

46
Q

a frequency distribution using the means computed from all possible random sample

A

SAMPLING DISTRIBUTION OF SAMPLE MEANS

47
Q

difference between the sample mean and the population

A

SAMPLING ERROR

DAY 3 MIDTERMS (6 decks)

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