Question

the who monica project collected blood - pressure data (in mmhg) for people in china. data based on information from the study are in the table below. determine if the data are from a population that is normally distributed.
104
106
107
112
118
119
124
127
128
132
132
133
138
140
142
143
156
158
158
170
a) identify the variable and type of variable in the context of this problem.
the variable information collected from each individual is the blood pressure
this variable is a quantitative variable.
b) does the graph support the claim that the sample data came from a normal population?

Explanation:

Step1: Recall variable - type concepts

The variable is the blood - pressure value of each person in the study. Since blood - pressure is measured numerically (in mmHg), it is a quantitative variable.

Step2: To check normality visually

One common way to check if data comes from a normal population is by creating a normal probability plot. If the points on the normal probability plot approximately form a straight - line, then the data is likely from a normal population. Without actually creating the normal probability plot (which is not shown here but can be done using statistical software or a graphing calculator with relevant functions), we can also consider the range and distribution of values. The data seems to have a somewhat symmetric spread around a central value, but we cannot be certain without further analysis like calculating skewness and kurtosis values or making the normal probability plot.

Answer:

a) Variable: Blood pressure; Type of variable: Quantitative
b) Without a normal probability plot or further statistical analysis (such as calculating skewness and kurtosis), we cannot definitively say whether the sample data came from a normal population.