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Duplicate of Chapter 17- Biostatistics Flashcards | StudBud
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Duplicate of Chapter 17- Biostatistics
Duplicate of Chapter 17- Biostatistics
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1
What does a p-value of 0.01 mean?
1:10 will produce the same research results
1:100 will produce the same research results
1:01 will produce the same research results
1:1000 will produce the same research results
2
Which does not describe qualitative data?
Expressed as outcomes or states
Reflects the quality or nature of variables
Numerical representations
Cannot be measured numerically
3
If p-value<alpha, we should reject the null hypothesis.
False
True
4
What type of sampling would give a researcher the most valid and reliable research results?
Convenience
Stratified
Systematic
Random
5
What are the four scales of measurement for data?
Scale, ordinal, ratio, interval
Caliber, nominal, ratio, interval
Ordinal, nominal, ratio, interval
Index, ordinal, interval, ratio
6
Which scale of measurement is not used in oral health research?
Interval
Nominal
Ordinal
Ratio
7
What is the mode of data scores: 2, 2, 2, 3, 4, 5?
3
18
4
2
8
Which of the following demonstrates the strongest correlation coefficient?
-0.6
-0.1
-0.7
0.2
9
_____ refers to the degree to which the study would yield the same results with the same population each time repeated
Internal validity
External validity
Significance
Reliability
10
What measure of central tendency is the midpoint of the data?
Mode
Mean
Variance
Median
11
What happens when you square a negative interger?
A negative number is created
A positive number is created
The average is rounded to the next whole number
The average stays the same
12
P-value determines the probability of the null hypothesis being true.
False
True
13
Inter-rater reliability is when test administration is consistent from a single examiner.
False
True
14
Alpha value sets the significance level of when the null should be rejected.
True
False
15
This scale of measurement shows the distance between 2 values as equal, with no absolute value.
Ordinal
Ratio
Interval
Nominal
16
Which type of statistic will compare groups, test a hypothesis, & make predictions?
Descriptive
Inferential
Correlative
Observational
17
Which term describes the square root of the variance?
Standard deviation
Range
Mean
Mode
18
Which of the following involves the use of data analysis and interpretation in health care research?
Correlation
Biostatistics
Data analysis
Interpretation
19
Which categorical variable places data into only two groups?
continuous
categorical
discrete
dichotomous
20
Which of the following are numeric data counted in terms of whole numbers?
Discrete
Continuous
Catagorical
Dichotomous
21
What type of research error occurs when a researcher mistakenly accepts null hypothesis?
Type III
Type IV
Type I
Type II
22
Standard deviation measures:
Central tendency of data
Spread of data
Dispersion of data
Both dispersion and spread of data
23
What significant p value is accepted in oral health research?
>0.50
<0.05
>0.05
<0.50
24
P-value represents the likelihood that statistics will occur due to chance.
True
False
25
Which scale of measurement is not used in oral health research?
Ratio
Interval
Interval
Ordinal