stats exam 1 part 2
One the first day of classes, students are asked to list their major (Chemistry, Exercise Science, Theology, etc.). What type of frequency distribution graph would be best to display their responses to this question?
Bar chart
For which of these variables would you create a grouped frequency distribution table to summarize the data you've collected?
Distance from campus (Miles)
A grouped frequency distribution table lists one interval as 20-29. The width of this interval is 9 points.
False
If a set of exam scores form a negatively skewed distribution, it suggests that the majority of the students did not score well on the exam.
False
If a set of scores covers a range of 80 points, the grouped frequency distribution table should use an interval width of 8 points.
False
If it is appropriate to present a distribution of scores in a polygon, then it would also be appropriate to present the scores in a bar graph.
False
In February in South Dakota, the daily high temperatures are typically low with only a few relatively warm days. A frequency distribution graph showing the daily high temperatures would probably form a negatively skewed distribution.
False
In a grouped frequency distribution table, the top value in each class interval should be a multiple of the interval width.
False
The scores for a very easy exam would probably form a positively skewed distribution.
False
You would use a _____ to illustrate data for the variable "Cost of a new vehicle."
Histogram
The students in a psychology class seemed to think that the midterm exam was very easy. If they are correct, what is the most likely shape for the distribution of exam scores?
Negatively skewed
What frequency distribution graph is appropriate for scores measured on a nominal scale?
Only a bar graph
Which of the following is NOT a guideline for creating grouped frequency distribution tables?
The data are grouped into arbitrary intervals.
Which of the following is a reason why researchers examine data by creating tables and figures?
To calculate inferential statistics
Which of the following is a reason why researchers examine data by creating tables and figures?
To understand the shape of the distribution
A grouped frequency distribution table does not provide enough information to obtain a complete listing of the original set of scores.
True
A histogram is constructed so that adjacent bars touch
True
In a grouped frequency distribution table, one interval is identified as 30-34. This interval has a width of 5 points.
True
In a grouped frequency distribution, which of the following statements is true?
You no longer know what the exact data points in the data set are.
You would use a _____ to illustrate data for a variable measured at the _____ scale of measurement.
bar chart; nominal
You would use a _____ to illustrate data for a variable measured at the _____ scale of measurement.
histogram; interval
Grouped frequency distribution tables are created to summarize data for variables measured at the _____ level of measurement.
interval or ratio
In a distribution that is positively skewed, scores with the highest frequencies are
on the left side of the distribution
For a variable measured at the _____ scale of measurement, one would use a _____ to illustrate the data.
ratio; frequency polygon
The normal distribution is _____.
symmetric
