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Bushra's Biostats > Statistical test > Flashcards

Statistical test Flashcards

1
Q

To know which statisttical test which 3 questions you must answer?

A

1 - What type of data you will collect?
2 - How many samples you have?
3 - What purpose you wanted to test?

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2
Q

1 - What type of data you will collect?

A
  • Nominal/ Cateorical/ Qualitative/ Nonparametric (%)
  • Interval ratio / Quantitative /Parametric- (mean)

e.g. weight , all continous variable are ratio except temperature which is an interval

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3
Q

2 - How many samples you have?

A
  • One
  • One sample but 2 measures
  • Two
  • Three
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4
Q

3 - What purpose you wanted to test?

A
  • Proportion
  • Mean
  • Relationship
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5
Q

Point Estimate P = X/n

Test for proportion

A
  • Data: - Nominal data
  • Sample : - 1 sample
  • Purpose: - Testing against a value
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6
Q

Mann- Whitney U Test (difference of 2 proportions)

A
  • Data: - Nominal data
  • Sample : - 2 sample
  • Purpose: - Comparing statistics
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7
Q

Chi-Square Test
Fisher Exact Test
Wilcoxon Rank Test (Chi- sq test for independence)

A
  • Data: - Nominal data
  • Sample : - 1 sample, 2 measure
  • Purpose: - Looking for relation ship
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8
Q

Independent T - Test

Difference of 2 means, independant sample

A
  • Data: - Interval /Ratio
  • Sample : - 2 samples
  • Purpose: - Comparing statistics
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9
Q
  • Pearsons/Spearmans Correlation///

- Linear Regression

A
  • Data: - Interval /Ratio
  • Sample :- 1 sample, 2 measure
  • Purpose: - Looking for relation ship
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10
Q

Student T - Test (Test for a mean)

A
  • Data: - Interval /Ratio
  • Sample : - 1 sample
  • Purpose: - Testing against value
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11
Q

Paired T Test ( Difference of 2 means , paired)

A
  • Data: - Interval /Ratio
  • Sample :- 1 sample, 2 measure
  • Purpose: - Testing against value
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12
Q

Purpose of test

Testing against value

A
  • Test for proportion
  • Test for a mean
  • Difference of 2 means (paired)
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13
Q

Purpose of test

Comparing statistics

A
  • Difference of 2 proportions

- Difference of 2 means (independent samples)

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14
Q

Purpose of test

Looking for relationship

A
  • Chi -sq test for independence

- Regression analysis

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15
Q

You are selling choconuts. You are concerned wheter your choconuts contain sufficient nuts. You took a sample of 20 packets and find the weiht of nuts in each packet. What statistical test you will use?

  • Data
  • Sample
  • Purpose
A
  • Data: RATIO, weight of nuts, all continous variable are ratio except temperature which is an interval
  • Sample : 1 ( 20 packets of choconuts)
  • Purpose: to know the MEAN weight of nuts perchoconuts

Student T - Test (Test for a mean)

  • Data: - Interval /Ratio
  • Sample : - 1 sample
  • Purpose: - Testing against value
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Bushra's Biostats (4 decks)

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