One and Two Sample Interference Flashcards

1
Q

this is the analysis and interpretation of data

A

inferential

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2
Q

parametric and non parametric test

A

inferential

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3
Q

are the test applied to data that are normally distributed

A

parametric test

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4
Q

parametric test is usually expressed in

A

interval and ratio

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5
Q

in parametric test, the skewness is equal to

A

zero

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6
Q

in parametric test, the kurtosis is equal to

A

0.265

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7
Q

True or False

parametric test is more powerful than non parametric test

A

true

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8
Q

what is the non parametric equivalent of paired t test

A

wilcoxon rank sum test

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9
Q

what is the non parametric equiavalent of unpaired t test

A

mann-whitney u test

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10
Q

its non parametric equivalent is spearman correlation

A

pearson correlation

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11
Q

what is the nonparametric equivalent of one way analysis of variance

A

kruskal wallis test

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12
Q

procedures in hypothesis testing

A
  1. formulate the null and alternative hypothesis
  2. choose a level of significance
  3. choose the appropriate test statistic
  4. establish critical region
  5. decision (accept null if outside the critical region)
  6. conclusion
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13
Q

if the computed t-statistics is less than the critical value, does it fall in the critical region?

A

it does not fall in the critical region

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14
Q

if the critical value falls in the critical value, should we reject or accept?

A

reject

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15
Q

this table is used to find the critical values based on 95% confidence level and alpha at 0.05

A

t table

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16
Q

this test involves the direction and the degrees of freedom in determining the probability or the critical value

17
Q

number of observations, and the data that are free to vary when estimating a statistical parameter

A

degrees of freedom

18
Q

degrees of freedom used to calculate what kind of values?

A

t-values and p-values

19
Q

it is used when you want to test if the sample’s mean from which the sample is drawn is at a hypothesized value

A

one sample interference

20
Q

it is typically implemented on small samples

A

one sample interference

21
Q

the purpose of this is to determine if the sample observation could have come from a process that followes a specific parameter like the mean

A

one sample interfence

22
Q

it is used to determine whether the mean of a sample data set is different from a known value

A

one sample mean test

23
Q

True or False

small sample size makes the test more conservative means that the small but important differences may be detected

A

False (small but important differences may NOT be detected)

24
Q

True or False

increasing sample size makes the statistical test more powerful

25
if outliers have a lot of influence on the results, what non parametric test might be appropriate to use?
wilcoxon rank sum test
26
what is the result of one sample mean test called?
student fisher distribution
27
what is the usual norm level of significance according to researchers?
0.05
28
This is used to determine the mean differences between two sets of the observations from the same sample is zero ○ each subject is measured twice leading to pairs of observations
paired t test
29
where do we drawn samples for paired t test
samples are drawn from the same population
30
Used in experimental design to test the effectiveness of a certain technique or method or program that had developed
paired t test
31
two types of t test
one sample and two sample interference
32
Used to determine the inference for a difference in the means of two normal distribution
two independent mean test
33
what is the non parametric test perform if the assumptions are not met in two independent variable
welch t test
34
Used to determine if two populations are equal and Determine if the difference is significant
two independent mean test
35
sample less than 30 (n<30)
one sample mean test
36
population less than 30 (N<30)
two independent mean test
37
this identifies which of the variance will be used for the interpretation (equal variances assumed or equal variances not assumed)
Levene's Test for Equality of Variances