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SD and NSD > NSD Day 8 > Flashcards

NSD Day 8 Flashcards

1
Q

Changes of the dependent variable because mainly of the independent variable and not some other variable

A

Internal validity

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2
Q

Results of the study are generalizable to the population - more a kin to generalization

A

External Validity

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3
Q

This is a systematic error in sampling

A

sampling bias

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4
Q

Intervening variables interact with the dependent - third party variable.

A

failure to exert rigid control over the subjects

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5
Q

learning effect as a result of taking the test

A

pre-test influence on post test

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6
Q

More than treatment is being given to the subject at the same time

A

Multiple treatment interference

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7
Q

the subjects knowledge of participation in an experiment influences the result of a study

A

Hawthorne effect

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8
Q

subjects respond to a dummy treatment with positive effects

A

placebo effect

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9
Q

This is an outcome measure that refers to its consistency or reproducibility - i.e. the ability to be copied

A

reliability

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10
Q

Repeated measure made by the same person over time

A

Intrarater reliability

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11
Q

Measurements made by moe the one person

A

interrater reliability

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12
Q

statistical measurement of inter rater reliability

A

kappa coefficient

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13
Q

This is the measure of internal consistency

A

Split Half Reliability

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14
Q

Purpose is to get the true positive: i.e. to rule out

A

Sensitivity

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15
Q

Purpose is to get the true negative: i.e. to rule in

A

Specificity

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16
Q

Indicates that person does not have a specific disease or condition when the person does have the disease or condition

A

false negative

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17
Q

Indicates that person does have a specific disease or condition when the person does nothave the disease or condition

A

fasle positive

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18
Q

Formula for sensitivity

A

Sn = A/A+C

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19
Q

Formula for specificity

A

Sp = D/B+D

20
Q

Formula for Positive PV

A

PPV = A/A+B

21
Q

Formula for Negative PV

A

NPV = D/C+D

22
Q

presumed to have caused or influenced the dependent variable, variable that is controlled or manipulated

A

independent variable

23
Q

Response or outcome assumed caused by the independent variable

A

dependent variable

24
Q

There is a true difference between groups therefore the treatment was effective

A

Alternate Hypothesis

25
Q

porbability that particular statistical value result could have happened by chance

A

P-Value - confidence interval

26
Q

significance level, standard for rejecting the null hypothesis

A

Alpha Level

27
Q

P < Alpha indicates

A

reject the null hypothesis

28
Q

P > Alpha indicates

A

Null hypothesis is not rejected

29
Q

wrongly deciding the reject the null hypothesis

A

Type 1 Error 9 | Alpha Error

30
Q

wrongly deciding to accept the null hypothesis

A

Type 2 Error | Beta Error

31
Q

Methods to decrease the possibility of error

A
  1. Increase Sample Size
  2. Use Random Sampling
  3. Increase the measure
32
Q

term used for average, for interval ratio data

A

Mean

33
Q

Divides a distribution into 2 equal halves, ordinal data

A

Median

34
Q

Value that occurs most Frequently, Nominal data

A

Mode

35
Q

The difference between the higher and lowest score

A

range

36
Q

divides the data into 100 equal portions

A

Percentiles

37
Q

Divides the distribution into 4 equal parts

A

Quartiles

38
Q

Determination of variability of scores (difference ) from the mean i.e.

A

Standard Deviation

39
Q

True to False:

In a normal bell shaped curve the mean, median and mode are all the same value

A

True

40
Q

In positive skewness the bell curve will devoted towards what side?

A

Right

41
Q

In negative skewness the bell curve will devoted towards what side?

A

Left

42
Q

this type of data used interval and ration data, population is normally distributed and has homogeneity of variance

sample size > 30

A

Parametric Data

43
Q

Nominal and ordinal data, non-normal distribution i.e. skewed curve, small sample size

A

Non-parametric data

44
Q

Compares the 2 independent variables

A

T-Test

45
Q

Compares the difference between 2 matched samples, repeated measures or paired data, within subject design

A

Paired or Dependent T-TEST

46
Q

Compares 3 or more independent groups

A

ANOVA

SD and NSD (7 decks)

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