Probability Distributions and Frequency Tables

How many classes are in this table?

• 1

• 2

• 3

• 4

Given above are marks obtained by 20 students in Math out of 25.

Identify the class mark/mid-value of the class "11-15"

• 11

• 12

• 13

• 14

Given above are marks obtained by 20 students in Math out of 25, presented in grouped frequency distribution table. Identify the upper class boundary for each class.

• 11, 16, 21

• 10.5, 15.5, 20.5

• 15, 20, 25

• 15.5, 20.5, 25.5

A table that lists the categories in a categorical variable and gives the number of observations for each category.

• chart

• bar chart

• cell

• frequency table

What is the probability that they speak French given they are a girl? 

• 2.14%

• 4%

• 40%

• 85.71%

What is the probability that a student plays an instrument?

• 72.7%

• 55%

• 10%

• 2.2%

Find the marginal distribution of people who believe they have almost no chance.

• 4.0%

• 7.5%

• 30%

• 45%

Find the marginal distribution of females.

• 46.2%

• 49.0%

• 50.2%

• 53.8%

What proportion of people that were against increasing in speed limit where between the ages of 20-34?

• 38/243

• 38/814

• 38/202

• 243/814

What type of frequency is the sum of each column and row out of the table total?

• Conditional Frequency

• Marginal Frequency 

• Relative Frequency

• None of the above