Flashcards in Example MCQ's Deck (27)

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1

## In SPSS what option can be used to show data frequency and distribution?

### Histogram

2

## What are the functions of the Data View interface in SPSS?

### To calculate and analyse data and display results with graphs

3

## Is the median exactly the same as the mean in normal distribution?

###
No (never say exactly in statistics)

The median is almost the same as the mean

4

## What can be shown using an error bar in SPSS?

### Mean and Mean +/- 2 SEM

5

## If 2 sets of samples have different means are their global means significantly different?

###
Don't know

(Need to do test of hypothesis)

6

## When would 2 sets of data be considered as significantly different?

### If p < 0.05 and p <0.01

7

## If patients are measure pre and post op which statistical method can be used to compare their means?

### Paired sample t-test

8

## What is the difference between paired and independent t-tests?

###
Paired - suitable for comparing two sets of data from the same group of subjects

Independent - suitable for comparing two sets of data from different subjects

9

## What effect does increasing the number of samples and SD have on the SEM?

###
As SD increases SEM increases

As n increases SEM decreases

10

## What does ANOVA stand for?

### Analysis of Variance

11

## When estimating the mean in a range of 95% confidence interval what are the approximately upper and lower bounds of the expected mean?

### Mean +/- 2 SEM

12

## When should users apply Post Hoc test?

### After an ANOVA

13

## How do you apply linear regression to non-linear situations?

### Replace the non-linear variable with a linear one

14

## What principle is applied in Chi square analysis when theoretically expected vales are used to compare practical data?

### All items occur at the same probability

15

## For what data would you use non-parametric test methods?

### Data is ordinal and rank

16

## For non-parametric tests what information from data can be used to assess differences between sample groups?

### Sign and rank

17

## If two variables have linear correlation what would be the expected p value?

### p <0.05 or p<0.01

18

## In a linear regression equation what coefficient will be calculated or estimated?

### The coefficient in front of a variable and a constant

19

## In linear regression what is the best quality result in terms of correlation?

### Closer to 1 or -1 = stronger correlation

20

## In what situation is the null hypothesis accepted?

### p >0.05

21

## In normal distribution how much data is roughly included in the ranges of mean +/- 1, 2 and 3 SD?

###
Mean +/- 1 SD = 68%

Mean +/- 2 SD = 95%

Mean +/- 3 SD = 99%

22

## What formats can be inputted into SPSS?

###
Text

Excel

Direct Input

23

## What are the requirements for using t-test?

###
Numerical data

Normal distribution

Small sample size

24

## Under what condition are 2 sets of data said to be significantly different?

### p <0.05 or *

25

## What is required for meta analysis to work?

### Collect data from multiple sources but with same format

26

## What is required for applying survival analysis in practice?

### The data used usually covers a long time period with a large sample size for each year

27