NJSLA NJSLA Data Analysis and Statistics 2

Question 1

A data set has values: 4, 4, 6, 8, 10, 10, 14. What is the mode?

Accepted Answer

4 and 10

Answer

4

Answer

10

Answer

8

Question 2

A probability experiment involves rolling a fair six-sided die. What is the probability of rolling a number greater than 4?

Accepted Answer

1/3

Answer

1/2

Answer

2/3

Answer

1/6

Question 3

A line graph shows sales rising from January to June and falling from June to December. What does the peak in June represent?

Accepted Answer

The maximum sales for the year

Answer

The minimum sales for the year

Answer

The average monthly sales

Answer

The median of all data points

Question 4

In a class of 30 students, 18 play sports. What is the ratio of students who play sports to those who do not?

Accepted Answer

3:2

Answer

2:3

Answer

3:5

Answer

5:3

Question 5

Which statistic describes how spread out the values in a data set are from the mean?

Accepted Answer

Standard deviation

Answer

Median

Answer

Mode

Answer

Range

Question 6

A two-way frequency table shows data for 100 students categorized by grade level and sport preference. How is a joint frequency different from a marginal frequency?

Accepted Answer

A joint frequency counts a specific combination of two categories, while a marginal frequency totals one entire row or column.

Answer

A joint frequency is the grand total, while a marginal frequency is a cell value.

Answer

A joint frequency is always larger than a marginal frequency.

Answer

A marginal frequency appears in the interior cells of the table.