Biostats

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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

48 Questions12 MinutesCreated by LearningVet101

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?

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

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

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?

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

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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