BIOSTATISTICS 2026/2027 QUESTIONS AND SOLUTIONS
RATED A+
✔✔Normal distribution is a _____________ - ✔✔Bell-Curve
✔✔most occurrences in the world fall into a - ✔✔Bell- curve
✔✔A bell curve explains why most random variables tend to be distributed __________
- ✔✔Normally
✔✔A bell curve is when _______, _________, ___________ are in equal value -
✔✔mean median and mode
✔✔Central limit theorem is when less sampling error occurs because of a
______________ sample size. 30 or more will estimate the population ___________ -
✔✔large, accurately
✔✔Skewed Distribution is when the distribution of scores is _________ -
✔✔asymmetrical
✔✔Skewing is caused by a few ____________ scores - ✔✔extreme
✔✔A skew score can be identified by comparing the _____________- and
___________ - ✔✔mean and median
✔✔Positive Skew - ✔✔
✔✔Negative Skew - ✔✔
✔✔Frequency distribution tables present data in a way that shows the number of times
each score occures in the ________ - ✔✔group
✔✔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
RATED A+
✔✔Normal distribution is a _____________ - ✔✔Bell-Curve
✔✔most occurrences in the world fall into a - ✔✔Bell- curve
✔✔A bell curve explains why most random variables tend to be distributed __________
- ✔✔Normally
✔✔A bell curve is when _______, _________, ___________ are in equal value -
✔✔mean median and mode
✔✔Central limit theorem is when less sampling error occurs because of a
______________ sample size. 30 or more will estimate the population ___________ -
✔✔large, accurately
✔✔Skewed Distribution is when the distribution of scores is _________ -
✔✔asymmetrical
✔✔Skewing is caused by a few ____________ scores - ✔✔extreme
✔✔A skew score can be identified by comparing the _____________- and
___________ - ✔✔mean and median
✔✔Positive Skew - ✔✔
✔✔Negative Skew - ✔✔
✔✔Frequency distribution tables present data in a way that shows the number of times
each score occures in the ________ - ✔✔group
✔✔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
