BIOSTATISTICS FINAL EXAM 2026/2027 QUESTIONS
AND SOLUTIONS RATED A+
✔✔Frequency distribution tables facilitates our ________ and ____________ of data -
✔✔understanding and interpretation
✔✔Graphs are ___________ representing data Also called a _______. Shows a
comparison with one or more other variables. - ✔✔pictures, Chart
✔✔Advantages of graphing data are effectiveness and economic communication of
data, easier and quicker understanding and interpretation of data, and the ability to -
✔✔compare multiple distributions
✔✔Bar graphs are used to represent ________________ data - ✔✔Categorical
✔✔Spaces separate bars to emphasize ________________ nature of the variables -
✔✔discrete
✔✔Length of the bar corresponds with the ___________- of the value - ✔✔frequency
✔✔Histogram is like a bar graph but bars ___________ - ✔✔touch
✔✔Histograms are used for interval or ratio ______________ - ✔✔variables
✔✔Frequency polygon is a line graph that represents the _____________ of data that
are continuous in nature. - ✔✔frequency
✔✔Frequency polygon is drawn by connecting the mid points of _____________ of a
histogram - ✔✔Bars
✔✔Polygon is a line graph used to plot a variable over - ✔✔time
✔✔Scattergram shows the relationship between ______ variables - ✔✔2
✔✔Scattergram show how the level of one variable varies as the other variable
___________ - ✔✔changes
✔✔Scattergram is plotted on X and Y axis and expressed as and ___________ value -
✔✔R
✔✔Correlation is a ______________ between variables that can be measured
mathematically. - ✔✔relationship
, ✔✔Correlation coefficient is used to measure correlation, where R is a number between
_______ and ___________ - ✔✔-1 and 1
✔✔The value of R communicates both _________ & ________ of the association -
✔✔Direction and strength
✔✔Ina positive relationship both variables vary in the ___________ direction - ✔✔same
✔✔In a negative relationship the variables vary in the ___________ direction -
✔✔opposite
✔✔the closer the R value is to 1 or -1 it indicates a ____________ relationship. -
✔✔Stronger
✔✔Statistical decision is a decision made about a ___________ hypothesis based on
the results of inferential statistics. - ✔✔null
✔✔Null hypothesis is accepted unless statistical test indicates that it should be
__________ - ✔✔rejected
✔✔ Biostatistics is the use of data analysis and interpretation in health care research
usually performed by ____________. - ✔✔Computers
✔✔Data analysis involves the application of statistical tests to organize, describe,
_____________ and _____________. - ✔✔summarize & analyze
✔✔Interpretation - ✔✔explains research results,requires critical thinking and draws
inferences
✔✔Dental hygienist should understand the research process to understand
epidemiology of disease, therapies, _________________, and __________________. -
✔✔Implement programs and Practice evidence based dentistry
✔✔Data set is a_________ - ✔✔group
✔✔Quantitative research is - ✔✔numerical
✔✔Qualitative data is info that cannot be ______________ - ✔✔measured
✔✔Continuous variable - ✔✔distinct and separate units that can be expressed by a
large and infinite number of measures along a continuum. Fractions.
AND SOLUTIONS RATED A+
✔✔Frequency distribution tables facilitates our ________ and ____________ of data -
✔✔understanding and interpretation
✔✔Graphs are ___________ representing data Also called a _______. Shows a
comparison with one or more other variables. - ✔✔pictures, Chart
✔✔Advantages of graphing data are effectiveness and economic communication of
data, easier and quicker understanding and interpretation of data, and the ability to -
✔✔compare multiple distributions
✔✔Bar graphs are used to represent ________________ data - ✔✔Categorical
✔✔Spaces separate bars to emphasize ________________ nature of the variables -
✔✔discrete
✔✔Length of the bar corresponds with the ___________- of the value - ✔✔frequency
✔✔Histogram is like a bar graph but bars ___________ - ✔✔touch
✔✔Histograms are used for interval or ratio ______________ - ✔✔variables
✔✔Frequency polygon is a line graph that represents the _____________ of data that
are continuous in nature. - ✔✔frequency
✔✔Frequency polygon is drawn by connecting the mid points of _____________ of a
histogram - ✔✔Bars
✔✔Polygon is a line graph used to plot a variable over - ✔✔time
✔✔Scattergram shows the relationship between ______ variables - ✔✔2
✔✔Scattergram show how the level of one variable varies as the other variable
___________ - ✔✔changes
✔✔Scattergram is plotted on X and Y axis and expressed as and ___________ value -
✔✔R
✔✔Correlation is a ______________ between variables that can be measured
mathematically. - ✔✔relationship
, ✔✔Correlation coefficient is used to measure correlation, where R is a number between
_______ and ___________ - ✔✔-1 and 1
✔✔The value of R communicates both _________ & ________ of the association -
✔✔Direction and strength
✔✔Ina positive relationship both variables vary in the ___________ direction - ✔✔same
✔✔In a negative relationship the variables vary in the ___________ direction -
✔✔opposite
✔✔the closer the R value is to 1 or -1 it indicates a ____________ relationship. -
✔✔Stronger
✔✔Statistical decision is a decision made about a ___________ hypothesis based on
the results of inferential statistics. - ✔✔null
✔✔Null hypothesis is accepted unless statistical test indicates that it should be
__________ - ✔✔rejected
✔✔ Biostatistics is the use of data analysis and interpretation in health care research
usually performed by ____________. - ✔✔Computers
✔✔Data analysis involves the application of statistical tests to organize, describe,
_____________ and _____________. - ✔✔summarize & analyze
✔✔Interpretation - ✔✔explains research results,requires critical thinking and draws
inferences
✔✔Dental hygienist should understand the research process to understand
epidemiology of disease, therapies, _________________, and __________________. -
✔✔Implement programs and Practice evidence based dentistry
✔✔Data set is a_________ - ✔✔group
✔✔Quantitative research is - ✔✔numerical
✔✔Qualitative data is info that cannot be ______________ - ✔✔measured
✔✔Continuous variable - ✔✔distinct and separate units that can be expressed by a
large and infinite number of measures along a continuum. Fractions.
