OSC 2030 Exam Ch 1-4 with all Correct & 100% Verified
Answers |Actual Complete Exam |Already Graded A+
A scatter diagram can show whether a pair of variables has a strong or weak relationship, and
also whether it is linear or curved.
True or False ✔Correct Answer-True
A histogram is most commonly used to analyze which of the following?
Time-series data
Ordinal data
Quantitative data
Nominal level data ✔Correct Answer-Quantitative Data
A histogram can be constructed for data that are either quantitative or qualitative.
True or False ✔Correct Answer-False
After developing a frequency distribution for a quantitative variable, a histogram can be
developed with the horizontal axis representing the values of the variable and the vertical axis
representing the frequency of occurrence in each class or group.
True or False ✔Correct Answer-True
Histograms cannot have gaps between the bars, whereas bar charts can have gaps.
True or False ✔Correct Answer-True
A major insurance company believes that for drivers between 16 years of age and 60 years of
age, the number of accidents per year tends to decrease as age increases. If this is the case, a
scatter diagram should show a negative relationship between the two variables.
True or False ✔Correct Answer-True
Bar charts can typically be formed with the bars vertical or horizontal without adversely
affecting the interpretation.
True or False ✔Correct Answer-True
In a scatter plot the points should always be connected with a line.
,True or False ✔Correct Answer-False
What is an example of a discrete random variable?
Number of customers coming into my bakery
Measuring how much something weighs
Timing a race on a stopwatch ✔Correct Answer-Number of customers coming into my bakery
To show how the price of a stock has changed over the last 3 months, the best type of chart to
use is:
a histogram.
a line chart.
a bar chart.
a pie chart. ✔Correct Answer-a line chart
The Malcolm Baldrige National Quality Award is used to raise awareness of quality management
and recognize international companies that have implemented successful quality management
systems.
True or False ✔Correct Answer-False
If a scatter diagram shows points that are reasonably aligned and are sloping downward from
left to right, this implies that there is a negative linear relationship between the two variables.
True or False ✔Correct Answer-True
A common rule of thumb for determining how many classes to use when developing a
frequency distribution with classes is:
between 5 and 20 classes.
equal to 0.25 times the number of data values.
at least 10 classes.
no fewer than 6 classes. ✔Correct Answer-between 5 and 20 classes
When a histogram is constructed for discrete numerical data, there should be spaces between
the bars of the histogram.
True or False ✔Correct Answer-False
To show the relationship between amount of rainfall and the number of car accidents, the best
type of graph to use is a scatter diagram.
True or False ✔Correct Answer-True
, A short survey with closed-end questions is likely to have a better response rate than a long
survey with open-ended questions.
True or False ✔Correct Answer-True
When a marketing manager surveys a few of the customers for the purpose of drawing a
conclusion about the entire list of customers, she is applying:
quantitative models.
descriptive statistics.
numerical measures.
inferential statistics. ✔Correct Answer-inferential statistics
Sales data measured each week for the past twenty weeks are examples of time-series data.
True or False ✔Correct Answer-True
Possibly the most frequently used nonstatistical sampling procedure is the simple random
sample.
True or False ✔Correct Answer-False
Recording vehicle type as sedan, minivan, pick-up truck, etc. is an example of qualitative data.
True or False ✔Correct Answer-True
When students are asked to list their age and the percentage of their college expenses that they
pay for themselves, the type of data being collected is quantitative.
True or False ✔Correct Answer-True
An accountant has recently prepared a report for a client that contains a variety of graphs and
charts. In doing so, she has used descriptive statistical methods.
True or False ✔Correct Answer-True
Simple random sampling involves selecting members of the population in such as way that all
members are equally likely to be chosen.
True or False ✔Correct Answer-True
The use of charts and graphs is an example of:
Answers |Actual Complete Exam |Already Graded A+
A scatter diagram can show whether a pair of variables has a strong or weak relationship, and
also whether it is linear or curved.
True or False ✔Correct Answer-True
A histogram is most commonly used to analyze which of the following?
Time-series data
Ordinal data
Quantitative data
Nominal level data ✔Correct Answer-Quantitative Data
A histogram can be constructed for data that are either quantitative or qualitative.
True or False ✔Correct Answer-False
After developing a frequency distribution for a quantitative variable, a histogram can be
developed with the horizontal axis representing the values of the variable and the vertical axis
representing the frequency of occurrence in each class or group.
True or False ✔Correct Answer-True
Histograms cannot have gaps between the bars, whereas bar charts can have gaps.
True or False ✔Correct Answer-True
A major insurance company believes that for drivers between 16 years of age and 60 years of
age, the number of accidents per year tends to decrease as age increases. If this is the case, a
scatter diagram should show a negative relationship between the two variables.
True or False ✔Correct Answer-True
Bar charts can typically be formed with the bars vertical or horizontal without adversely
affecting the interpretation.
True or False ✔Correct Answer-True
In a scatter plot the points should always be connected with a line.
,True or False ✔Correct Answer-False
What is an example of a discrete random variable?
Number of customers coming into my bakery
Measuring how much something weighs
Timing a race on a stopwatch ✔Correct Answer-Number of customers coming into my bakery
To show how the price of a stock has changed over the last 3 months, the best type of chart to
use is:
a histogram.
a line chart.
a bar chart.
a pie chart. ✔Correct Answer-a line chart
The Malcolm Baldrige National Quality Award is used to raise awareness of quality management
and recognize international companies that have implemented successful quality management
systems.
True or False ✔Correct Answer-False
If a scatter diagram shows points that are reasonably aligned and are sloping downward from
left to right, this implies that there is a negative linear relationship between the two variables.
True or False ✔Correct Answer-True
A common rule of thumb for determining how many classes to use when developing a
frequency distribution with classes is:
between 5 and 20 classes.
equal to 0.25 times the number of data values.
at least 10 classes.
no fewer than 6 classes. ✔Correct Answer-between 5 and 20 classes
When a histogram is constructed for discrete numerical data, there should be spaces between
the bars of the histogram.
True or False ✔Correct Answer-False
To show the relationship between amount of rainfall and the number of car accidents, the best
type of graph to use is a scatter diagram.
True or False ✔Correct Answer-True
, A short survey with closed-end questions is likely to have a better response rate than a long
survey with open-ended questions.
True or False ✔Correct Answer-True
When a marketing manager surveys a few of the customers for the purpose of drawing a
conclusion about the entire list of customers, she is applying:
quantitative models.
descriptive statistics.
numerical measures.
inferential statistics. ✔Correct Answer-inferential statistics
Sales data measured each week for the past twenty weeks are examples of time-series data.
True or False ✔Correct Answer-True
Possibly the most frequently used nonstatistical sampling procedure is the simple random
sample.
True or False ✔Correct Answer-False
Recording vehicle type as sedan, minivan, pick-up truck, etc. is an example of qualitative data.
True or False ✔Correct Answer-True
When students are asked to list their age and the percentage of their college expenses that they
pay for themselves, the type of data being collected is quantitative.
True or False ✔Correct Answer-True
An accountant has recently prepared a report for a client that contains a variety of graphs and
charts. In doing so, she has used descriptive statistical methods.
True or False ✔Correct Answer-True
Simple random sampling involves selecting members of the population in such as way that all
members are equally likely to be chosen.
True or False ✔Correct Answer-True
The use of charts and graphs is an example of:
