Biostats
Explore Your Biostatistics Knowledge!
Test your understanding of biostatistics through this comprehensive quiz designed for veterinary students and professionals. With 48 challenging questions, you can assess your knowledge in key statistical concepts, probability, and data interpretation.
Key Features:
- 48 multiple-choice questions
- Focus on practical veterinary applications
- Score tracking to measure your progress
Probability experiment is
A process whose final outcome is unknown
A process whose final outcome is precisely known
An experiment conducted on a diseased animal
An experiment conducted on a healthy animal
Event opposite to event A
Does not include events which belong to the sample space and do not belong to event A
Includes all events which belong to the sample space and do not belong to event A
Includes all events which belong neither to the sample space to event A
Includes all events which do not belong to the sample space and belong to event A
Event B is contained in event A if
A. Randomly selected elementary event belonging to event B, does not belong to event A
B. Each elementary event belonging to event A, belongs also to event B
C. Each elementary event belonging to event B, does not belong to event A
D. Each elementary event belonging to event B, belong also to event A
4. The litter consist of 4 males and 6 females. The probability of picking a female, when only one individual can be selected is:
0.2
0.4
0.6
0.8
5. There are 4 numbered rooms in a farm building. How many combinations of disposing 5 animals (one animal in one room are possible?
25
50
100
120
In variation with repetitions:
A. Order of elements is important and each element can be selected only once
B. Order of elements is not important and each element can be selected only once
C. Order of elements is important and each element can be selected many times
D. Order of elements is not important and each element can be selected many times
Examples of qualitative (categorical) data with which can be encountered in veterinary practice are:
Number of puppies in a litter, body weight of a piglet, body temperature of a goat
Body temperature of a sheep, number of a caudal vertebrae in mammals, color of a boar’s urine
Milk yield of goats, clinical condition of a bitch after mastectomy, length of an estral cycle of a sow
D. All answers mentioned above are correct
Examples of qualitative (caterorical) data with which can be encountered in veterinary practice are:
Species, breed and gender of animals
Number of animals which belong to each species, breed and gender
Color of dog’s mucous membranes, smell of cat’s breath, presence of murmurs in horse’s heart
Answers A and C are correct
Dogs kept in a kennel were devided into 3 groups, according to their breeds: German Sheppards, Poodles and Dobermans. It is an example of:
A. Quantitative scale
B. Nominal scale
C. Ordinal scale
D. Ratio scale
Interval scale can be used to present:
A. Qualitative data only
B. Quantitative data only
C. Both qualitative and quantitative data
D. All answers mentioned above are incorrect
Milk yied of cows is expressed in kilos and this is an example of:
A. Nominal scale
B. Ordinal scale
C. Interval scale
D. Ratio scale
From among following values: arithmetic mean, median, mode, quartiles, select which are measures of central tendency (location):
A. Arithmetic mean, median, mode, quartiles
B. Arithmetic mean, median and mode only
C. Arithmetic mean and median only
D. Arithmetic mean only
Coefficient of variation is:
A. The measure of asymmetry
B. The measure of dispersion (spread)
D. A synonym of standard deviation
C. The measure of central tendency (location)
To calculate average relative change we should use the formula for:
A. Weighted arithmetic mean
B. Harmonic mean
C. Geometric mean
D. Arithmetic mean
There are 5 piglets weighing 2,1; 3,2; 3,4; 2,5; 10,2 kg gathered in a pen. The best measure of central tendency (location) for this population is:
A. Arithmetic mean
B. Weighted arithmetic mean
C. Mode
D. Median
We cannot use arithmetic mean as a measure of central tendency for a population when
A. All values of a variable are similar
B. Variable is of normal distribution
C. Variable is qualitative (categorical)
D. All answers are wrong
The median (in Polish: MEDIANA) for following series of data: 2,7; 2,7; 3,8; 3,8; 3,9; 5,1; 5,1; 5,1; 5,9 is:
3.9
2.7
5.1
5.9
The mode (in Polish: WYST. NAJCZESCIEJ) for following series of data; 3,6; 3,8; 4,5; 4,7; 5,9; 6,1 is
3.6
4.5
6.1
No answer correct
The second quartile is equal to:
The median
The fifth decile
The fifth percentile
Both A and B correct
Litter sizes for 5 randomly selected bitches are: 4, 6, 7, 7, 10. Standard deviation (in Polish: ODCH, STANDARDOWE) for such population equals:
1.8
2.2
6.3
7.1
Student’s t-test compares
A. Two medians
B. Two arithmetic means
C. Two modes
D. Two kurtoses
We must use Mann-Whitney U test when:
A. Variables have a normal distribution
B. Variables are dependent (paired) and Student’s t-test cannot be applied
C. Variables are independent (unpaired) and Student’s t-test cannot be applied
D. Variables are dependent (paired) and Student’s t-test can be applied
Which point represents the example of dependent variables:
A. Level of antibodies to canine distemper virus (CDV) in the same dog before and after vaccination
B. Level of adrenaline in the same dog before and after vaccination againts distemper
C. Level of antibodies to canine distemper virus (CDV) in two different dogs before and after vaccination with the use of different vaccines
D. Both answers A and B are correct
Null hypothesis always says that:
A. Difference between variables is insignificant
B. Variables differ
C. Alternative hypothesis is correct
D. Difference between variables is significant
Which significant tests can be applied to detect statistically significant difference between qualitative (categorical) data in ordinal scale:
A. Student’s t-test for both dependent and independent variables
B. Student’s t-test for independent variables only
C. Student’s t-test for dependent variables only
D. Wilcoxon or Mann-Whitney U test
To compare differences in average body weight gain between two litters of puppies we should use the significant test for:
A. Dependent variables
B. Unpaired (independent) variables
C. Paired variables
D. Qualitative variables
Elementary event is:
A single possible outcome of a probability experiment
A set of all possible outcomes of a probability experiment
An experiment conducted on a diseases animal
An experiment conducted on a healthy animal
Event A is contained in event B if:
Randomly selected elementary event belonging to event B, does not belong to event A
Each elementary event belonging to event A, belongs also to event B
Each elementary event belonging to event B, does not belong to event A
Each elementary event belonging to event B, belongs also to event A
The litter consists of 2 males and 8 females. The probability of picking a female, when only one individual can be selected is:
0.2
0.4
0.6
0.8
There are 4 numbered rooms in a farm building. How many combinations of disposing 4 animals (one animal in one room) are possible?
24
6
16
25
In variation without repetitions
Order of elements is important and each element can be selected only once
Order or elements in not important and each element can be selected only once
order of elements is important and each element can be selected many times
Order of elements is not important and each element can be selected many times
Examples of qualitative (categorical) data with which can be encountered in veterinary practice are:
Number op puppies in a litter, body weight of a piglet, body temperature of a goat
Body temperature of a sheep, number of caudal vertebrae in mammals, colour of boar’s urine
) milk yield of goats (in kilos), clinical condition of a bitch after mastectomy, length of an estral cycle of a sow (in hours)
No answer mentioned above is correct
Examples of quantitative (numerical) data which can be encountered in veterinary practice are:
Species, breed and gender of animals
Number of animals which belong to each species, breed and gender
colour of dog’s mucous membranes, smell of a cat’s breath, presence of murmurs in horse’s heart
Answer A and C is correct
Dogs kept in a kennel were divided into 3 groups according to their body weight: small (<15kg), medium (15-25) and large (>25). It is an example of:
Quantitative scale
Nominal scale
Ordinal scale
Ratio scale
Ratio scale can be used to present
Qualitative data only
Categorical data only
Both qualitative and quantitative data
All answers mentioned above are wrong
Milk yield of cows is expressed in kilos and best way to present is to use:
Nominal scale
Ordinal scale
Interval scale
Ratio scale
From among following values: arithmetic means, median, coefficient of variation, mode, quartiles select these which ARE NOT measures of central tendency (location):
Arithmetic mean, median, mode, quartiles, coefficient of variation
Arithmetic mean, median and mode only
Coefficient of variation and median only
Coefficient of variation only
Standard deviation is
The measure of asymmetry
The measure of dispersion (spread)
The measure of central tendency (location)
A synonym of quartile deviation
To calculate average relative change we should use the formula for:
Weighted arithmetic mean
Harmonic mean
Geometric mean
Arithmetic mean
There are 5 piglets weighing 2,1: 3,2: 3,4: 2,5: 10,2 kg gathered in a pen. The best measure of central tendency (location) for this population is:
Arithmetic mean
Weighted arithmetic mean
Mode
Median
We cannot use arithmetic mean as a measure of central tendency for a population when:
All values of a variable are similar
Variable is of normal distribution
Variable is qualitative (categorical)
All answers are wrong
The median (in polish: MEDIANA) for following series of data: 2,7; 2,7; 3,8; 3,8: 3,9; 5,1; 5,1; 5,1; 5,9 is:
3.9
2.7
5.1
5.9
The mode (in polish: WYST. NAJCZESCIEJ) for following series of data: 3,6; 3,8; 4,5; 4,7; 5,9; 6,1 is:
3.6
4.5
6.1
No answer correct
The second quartile is equal to:
The median
The fifth decile
The tifth percentile
Both A and B answers are correct
Litter sizes for 5 randomly selected bitches are: 4, 6, 7, 7, 10. Standard deviation (in polish: ODCH. STANDARDOWE) for such population equals
1.8
2.2
6.3
7.1
For the distribution presented below the true statement sounds: * THERE IS A CURVE SUPPOSED TO BE HERE!!
The distribution is right-hand asymmetric and coefficient of asymmetry is below 0
The distribution is right-hand asymmetric and coefficient of asymmetry is above 0
The distribution is left-hand asymmetric and coefficient of asymmetry is above 0
The distribution is left-hand asymmetry and coefficient of asymmetry is below 0
Student’s t-test compare
Two medians
Two arithmetic means
Two modes
Two kurtoses
We must use Mann-Whitney U test when
Variable have a normal distribution
Variables are dependent (paired) and Student’s t-test cannot be applied
Variables are independent (unpaired) and Student’s t-test cannot be applied
Variables are dependent (paired) and Student’s t-test can be applied
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