FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 2: Frequency Distributions

Show Answer

Share

---

All types

Filters

Study FlashcardsPractice ExamLearn

Question 21

Multiple Choice

Review LaterAdd Note

Review Later

For the distribution in the following table, what is the percentile rank for X = 8.5? $\begin{array}{cc}X & C / 0 \\\hline 9 & 100 \% \\8 & 80 \% \\7 & 50 \% \\6 & 25 \%\end{array}$

A) $\mathrm{X}=90 \%$
B) $X=80 \%$
C) $X=65 \%$
D) $X=50 \%$

E) A) and B)
F) A) and C)

Correct Answer

verified

Show Answer

Question 22

True/False

Review LaterAdd Note

Review Later

If a set of exam scores forms a negatively skewed distribution, it suggests that the majority of the students did not score well on the exam.

A) True
B) False

Correct Answer

verified

Show Answer

Question 23

Multiple Choice

Review LaterAdd Note

For the distribution in the following table, what is the percentile rank for X = 7? $\begin{array}{cc}X & C / 0 \\\hline 9 & 100 \% \\8 & 80 \% \\7 & 50 \% \\6 & 25 \%\end{array}$

For the scores shown in the following stem and leaf display, what is the highest score in the distribution? $\begin{array}{l|l}8 & 314 \\7 & 945 \\6 & 7042 \\5 & 68 \\4 & 14\end{array}$

A researcher surveys a sample of n = 200 college students and asks each person to identify his or her favorite movie from the past year.If the results are presented in a frequency distribution graph, the researcher should use a bar graph.

In February in New York, the daily high temperatures are typically low with only a few relatively warm days.A frequency distribution showing the daily high temperatures would probably form a negatively skewed distribution.

What kind of frequency distribution graph shows the frequencies as bars, with no space between adjacent bars?

A group of quiz scores ranges from 3 to 10, but no student had a score of X = 5.If the scores are put in a frequency distribution table, X = 5 would not be listed in the X column.

For the following distribution of scores, $\sum$ X² = 92. $\begin{array}{ll}X & f \\\hline 4 & 1 \\3 & 2 \\2 & 3 \\1 & 2\end{array}$

The normal distribution is an example of

A histogram is constructed so that adjacent bars touch.

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.

What frequency distribution graph is appropriate for scores measured on a nominal scale?

A researcher records the number of traffic tickets issued in each county along the New York State thruway.If the results are presented in a frequency distribution graph, what kind of graph should be used?

If a set of exam scores forms a symmetrical distribution, what can you conclude about the students scores?

For the following distribution, what is the width of each class interval? $\begin{array}{cc}X & f \\\hline 20-24 & 2 \\15-19 & 5 \\10-14 & 4 \\5-9 & 1\end{array}$

In the following distribution, the scores are grouped into class intervals that are each 5 points wide.

For the following frequency distribution of quiz scores, how many individuals took the quiz? $\begin{array}{cc}X & f \\\hline 5 & 6 \\4 & 5 \\3 & 5 \\2 & 3 \\1 & 2\end{array}$

For the distribution in the following table, what is the 50^th percentile? $\begin{array}{cc}Y & 0 / 0 \\\hline 9 & 100 \% \\8 & 80 \% \\7 & 50 \% \\6 & 250 / 0\end{array}$

In a grouped frequency distribution table, the top value in each class interval should be a multiple of the interval width.