Descriptive Statistics Quiz

What type of graph is commonly used to show the sales distribution of a company?

• Scatter plot

• Line graph

• Bar graph

• Pie chart

Answer explanation

A bar graph is commonly used to show a frequency distribution by representing each category with a bar whose height corresponds to the frequency of that category.

Which measure of central tendency is the score that falls in the middle of an ordered distribution of scores?

• Range

• Mode

• Median

• Mean

Answer explanation

The measure of central tendency that falls in the middle of an ordered distribution of scores is the Median. It represents the middle value when the data is arranged in ascending or descending order.

Hey there! Can you guess what a bimodal distribution indicates?

• One high point

• Multiple low points

• No high points

• Two high points

Answer explanation

A bimodal distribution indicates two high points, meaning there are two peaks in the data set.

What is the term used to describe a distribution when scores are united on the higher frequency side?

• mode

• median

• no skew

• negative skew

Answer explanation

Data clustered on left, and tail is on the right. It is on high numbers that there is high frequency.

Can you help SpongeBob calculate the standard deviation of Krabby Patty sales?

• Mean squared deviation from the median

• Square root of the average squared difference

• Sum of all scores divided by the number of scores

• Difference between highest and lowest score

Answer explanation

The formula for finding the standard deviation is the square root of the average squared difference.

Which type of graph is used to show how characters performed in a cartoon competition?

• Line graph

• Histogram

• Box plot

• Scatter plot

Answer explanation

Histogram is used to show how numbers are distributed, making it the correct choice for this question.

Hey there! Can you tell me, what is the mode in a distribution?

• The average of all scores

• The most frequent score

• The lowest score

• The highest score

Answer explanation

The mode in a distribution is the most frequent score, not the average, lowest, or highest score.

Hey there! Let's dive into a fun question together!

What does regression to the mean suggest?

• Average test scores become more extreme over time

• Average test scores remain constant over time

• Extreme test scores remain constant over time

• Extreme test scores tend to become more average over time

Answer explanation

Regression to the mean suggests that extreme measurements tend to become more average over time.

Hey there! Let's play a game to test your knowledge. How do we measure variability in a classroom using the range?

• By adding up all the test scores

• By finding the average of all the test scores

• By determining the difference between the highest and lowest test score

• By calculating the square root of the average squared difference

Answer explanation

By finding the difference between the highest and lowest score

What does a positively skewed distribution indicate?

• No central tendency in scores

• Even distribution of scores

• Scores concentrated towards the low frquency side

• Scores concentrated towards the high frequency side

Answer explanation

A positively skewed distribution indicates that scores are concentrated towards the right side, with a tail extending towards the left side.