Stats Week 1

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