MA320 - Statistics
Statistics
Question number 1
We use a sample instead of a population because:
We don't have access to everyone in the population
We don't have enough money to question everyone in a population
We don't have time to question everyone in a population
All of the above
Correct
Question number 2
The values of quantitative continuous variables are usually:
numbers with decimals
words
whole numbers
Correct
Sixty-five randomly selected car salespersons were asked the number of
cars they generally sell in one week. Fourteen people answered that they
generally sell three cars; nineteen generally sell four cars; twelve generally
sell five cars; nine generally sell six cars; and eleven generally sell seven
cars.
Data Value (# Frequenc Relative Cumulative
cars) y Frequency Relative
Frequency
3 14 0.22 0.22
4 19 0.29 0.51
5 12 0.18 0.69
6 9 0.14 0.83
7 11 0.17 1.00
, MA320 - Statistics
Question number 3
What was the most frequent response (number of times)?
4
Correct
Data Value (# Frequenc Relative Cumulative
cars) y Frequency Relative
Frequency
3 14 0.22 0.22
4 19 0.29 0.51
5 12 0.18 0.69
6 9 0.14 0.83
7 11 0.17 1.00
Question number 4
What percent of salespersons sell at least 5 cars per week?
49
%
Correct
Question number 5
What is the variable in this study:: A researcher is interested in knowing the average salary of a
player on the Miami Marlins baseball team.
salary of a player on the Miami Marlins
average salaries of baseball players
baseball
Miami Marlins
Correct
Statistics
Question number 1
We use a sample instead of a population because:
We don't have access to everyone in the population
We don't have enough money to question everyone in a population
We don't have time to question everyone in a population
All of the above
Correct
Question number 2
The values of quantitative continuous variables are usually:
numbers with decimals
words
whole numbers
Correct
Sixty-five randomly selected car salespersons were asked the number of
cars they generally sell in one week. Fourteen people answered that they
generally sell three cars; nineteen generally sell four cars; twelve generally
sell five cars; nine generally sell six cars; and eleven generally sell seven
cars.
Data Value (# Frequenc Relative Cumulative
cars) y Frequency Relative
Frequency
3 14 0.22 0.22
4 19 0.29 0.51
5 12 0.18 0.69
6 9 0.14 0.83
7 11 0.17 1.00
, MA320 - Statistics
Question number 3
What was the most frequent response (number of times)?
4
Correct
Data Value (# Frequenc Relative Cumulative
cars) y Frequency Relative
Frequency
3 14 0.22 0.22
4 19 0.29 0.51
5 12 0.18 0.69
6 9 0.14 0.83
7 11 0.17 1.00
Question number 4
What percent of salespersons sell at least 5 cars per week?
49
%
Correct
Question number 5
What is the variable in this study:: A researcher is interested in knowing the average salary of a
player on the Miami Marlins baseball team.
salary of a player on the Miami Marlins
average salaries of baseball players
baseball
Miami Marlins
Correct
