Question 1

Which of the following best describes the main advantage of using a histogram over a frequency distribution table when analyzing data?

Accepted Answer

A histogram visually displays the shape, center, and spread of the data, making interpretation easier.

Question 2

A relative frequency histogram differs from a standard histogram in which way?

Accepted Answer

The vertical axis shows proportions or percentages instead of actual frequencies.

Question 3

A histogram of arm circumferences in a population is bell-shaped and symmetric. Which distribution does this most likely represent?

Accepted Answer

Normal distribution

Question 4

Which of the following is NOT a use of a histogram?

Accepted Answer

Showing the relationship between two variables

Question 5

A histogram of commute times is shown with a longer tail on the right side. How would you describe the skewness of this distribution?

Accepted Answer

Skewed to the right (positively skewed)

Question 6

Which of the following best describes a normal quantile plot for a normal distribution?

Accepted Answer

The points form a straight-line pattern with no systematic deviations.

Question 7

Suppose you are analyzing the distribution of cholesterol levels in a population. The histogram is not symmetric and has a longer left tail. What is the best description of this distribution?

Accepted Answer

Skewed to the left (negatively skewed)

Question 8

Which of the following is a criterion for concluding that a population distribution is NOT normal based on a normal quantile plot?

Accepted Answer

The points show a systematic pattern that is not a straight-line pattern.

Question 9

A researcher creates a histogram of exam scores for a large class. The histogram is flat, with all bars approximately the same height. What type of distribution is this?

Accepted Answer

Uniform distribution

Question 10

Which of the following statements about frequency distributions is TRUE?

Accepted Answer

Frequency distributions help organize and summarize large data sets.

Question 11

A normal quantile plot is constructed for a data set. The points deviate from a straight line and show a clear curve. What does this indicate about the data?

Accepted Answer

The data are not normally distributed.

Question 12

Which of the following best describes the vertical axis of a relative frequency histogram?

Accepted Answer

It shows the proportion or percentage of observations in each class.

Question 13

A hospital administrator wants to analyze the distribution of patient wait times. Which graphical tool would best help identify outliers and the overall shape of the distribution?

Accepted Answer

Histogram

Question 14

Which of the following is NOT a characteristic that can be visually assessed from a histogram?

Accepted Answer

The mean of the data

Question 15

A data set of daily temperatures is summarized in a histogram. The histogram has a peak in the center and tails off equally on both sides. What is the best description of this distribution?

Accepted Answer

Normal distribution

Question 16

Which of the following is a correct interpretation of a histogram with a single peak and a long tail to the left?

Accepted Answer

The data are skewed to the left.

Question 17

A normal quantile plot is used to assess normality. Which pattern would indicate that the data are likely normal?

Accepted Answer

The points form a straight line.

Question 18

Which of the following is a reason why a histogram might be preferred over a bar chart for quantitative data?

Accepted Answer

Histograms can display the distribution of continuous data.

Question 19

A researcher wants to compare the proportion of students who commute less than 30 minutes to those who commute more than 60 minutes. Which graphical tool would best help with this comparison?

Accepted Answer

Relative frequency histogram

Question 20

Which of the following is a key feature of a normal distribution as seen in a histogram?

Accepted Answer

The distribution is symmetric and bell-shaped.

Week 2- 2.2

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