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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

If a bell curve is drawn of data and the answer lies in the main middle bit what is the p value and are they significantly different?

p > 0.05
They are significantly different