OPRE 3360 Exam 1
What are the types of scales of measurements? and explain each one -
correct answer✔ ✔ 1- Nominal- numeric or nonnumeric
2-Ordinal - numeric or nonnumeric can put the numbers in order and
rank them
3-Ratio- ratio of two intervals is meaningful, 0 must be able to exist so
age is not a part of this
4-Interval- is part of ordinal but the the interval between is a number
What is the difference between descriptive statistics and statistical
inference? - correct answer✔ ✔ Descriptive- a conclusion is formed
by using the data in the data set
Statistical inference- saying a claim that is hypothesized from past
conclusions
Is this an example of descriptive statistics or statistical inference?
"Based on this sample, the president of the company said that "45% of
all our employees' yearly incomes are at least $35,000." - correct answer
✔ ✔ Statistical inference
, Which of the following is an example of quantitative data?
a.
the player's number on a baseball uniform
b.
the serial number on a one-dollar bill
c.
the part number of an inventory item
d.
the number of people in a waiting line - correct answer✔ ✔ d.
the number of people in a waiting line
Which of the following is NOT an example of descriptive statistics?
a.
a histogram depicting the age distribution for 30 randomly selected
students
What are the types of scales of measurements? and explain each one -
correct answer✔ ✔ 1- Nominal- numeric or nonnumeric
2-Ordinal - numeric or nonnumeric can put the numbers in order and
rank them
3-Ratio- ratio of two intervals is meaningful, 0 must be able to exist so
age is not a part of this
4-Interval- is part of ordinal but the the interval between is a number
What is the difference between descriptive statistics and statistical
inference? - correct answer✔ ✔ Descriptive- a conclusion is formed
by using the data in the data set
Statistical inference- saying a claim that is hypothesized from past
conclusions
Is this an example of descriptive statistics or statistical inference?
"Based on this sample, the president of the company said that "45% of
all our employees' yearly incomes are at least $35,000." - correct answer
✔ ✔ Statistical inference
, Which of the following is an example of quantitative data?
a.
the player's number on a baseball uniform
b.
the serial number on a one-dollar bill
c.
the part number of an inventory item
d.
the number of people in a waiting line - correct answer✔ ✔ d.
the number of people in a waiting line
Which of the following is NOT an example of descriptive statistics?
a.
a histogram depicting the age distribution for 30 randomly selected
students
