NJSLA NJSLA Data Analysis and Statistics 3

Question 1

A bag contains 3 red marbles, 5 blue marbles, and 2 green marbles. If one marble is drawn at random, what is the probability it is blue?

Accepted Answer

1/2

Answer

1/3

Answer

2/5

Answer

3/10

Question 2

A stem-and-leaf plot shows stems 4, 5, 6, 7 with leaves 2 3 | 1 5 9 | 0 4 | 3. How many data values are in the 50s?

Accepted Answer

3

Answer

2

Answer

4

Answer

1

Question 3

Which of the following best describes a situation where two events are independent?

Accepted Answer

Flipping a coin twice, where the result of the first flip does not affect the second

Answer

Drawing two cards without replacement from a deck

Answer

Choosing a student from a class and then choosing another without replacement

Answer

Rolling a die and adding the next roll based on the first result

Question 4

A data set has a mean of 50 and a standard deviation of 5. A value of 65 is how many standard deviations above the mean?

Accepted Answer

3

Answer

2

Answer

4

Answer

5

Question 5

On a dot plot, several dots are stacked at the value 7, and the rest are spread between 1 and 5. What does the cluster at 7 suggest?

Accepted Answer

7 is the most frequent value in the data set.

Answer

7 is the mean of the data set.

Answer

7 is an outlier far from the rest of the data.

Answer

7 is the only value recorded.

Question 6

A student wants to determine whether taller students tend to score higher on a math test. Which type of graph should they use?

Accepted Answer

Scatter plot

Answer

Bar graph

Answer

Histogram

Answer

Pie chart