A frequency polygon is a line graph of frequency plots. This can be used in tandem with a histogram by joining the midpoints of the bars of the histogram
What is the first step in the statistical method?
Analyzing data
Collecting data
Presenting data
Drawing conclusions
Which type of statistics is used to summarize data?
Inferential statistics
Descriptive statistics
Predictive statistics
Analytical statistics
What is a sample?
A set containing all the people or objects to be described and analyzed
A subset or subgroup of the population
A sample that exhibits characteristics typical of the target population
A random selection of individuals
What is the first step in the methodology of random sampling?
Assign numbers to each element.
Identify each element in the population.
Randomly select numbers.
Assign the elements to the sample set.
What is the main visual difference between a histogram and a frequency polygon?
Histograms have lines, frequency polygons have bars
Histograms have bars, frequency polygons have lines
Both have bars
Both have lines
How is a stem-and-leaf plot constructed?
By combining data items into one part
By separating each data item into two parts
By using only the units' digit
By using only the tens' digit
What is the mean of the data set: 10, 20, 30, 40, 50?
20
30
40
50
What is the median of the data set: 2, 4, 6, 8, 10, 12?
5
6
7
8
What is the mode of the data set: 7, 8, 8, 9, 10?
7
8
9
10
How is the mean calculated?
By multiplying the data items
By dividing the sum of data items by the number of items
By subtracting the smallest item from the largest
By adding all the data items
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