BMAL 590 WEEK 5 EXAM QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS
inferential statistics
You take a random sample of 100 students at your university and find that their average GPA is 3.. If you
use this information to help you estimate the average GPA for all students at your University then you
are doing what branch of Statistics?
Sample
A company has developed a new computer sound card whose average lifetime is unknown, 200 sound
cards are randomly selected from a large production line and tested; their average lifetime is found to be
5 years. The 200 sounds cards represent a
Statistic
A company has developed a new computer sound card whose average lifetime is unknown. In order to
estimate the average, 200 sound cards are randomly selected from a large production line and tested ;
their average lifetime is found to be 5 years. The 5 years represents a
Parameter
A summary measure that is computed from a population is called a
A significance level
Which of the following is a measure of the reliability of a statistical inference?
, doing inferential statistics.
The Process of using sample statistics to draw conclusions about population parameters is called
All registered voters in the state of Michigan
Which of the following represents a population, as opposed to a sample?
the 500 adult pine trees selected at random selected at random from this forest.
A study in underway to determine the average height of all 32000 adult pines trees in a certain national
forest. The heights of 500 randomly selected adult pine tree are measured and analyzed. The sample this
study is
the proportion of times a conclusion about a population will be wrong in the long run
The significance level of statistical inference measures
the proportion of times an estimation procedure will be correct in the long run
The confidence level of a statistical inference measures
A survey
A marketing research firm selects a random sample of adults and asks them a list of questions regarding
their beverage preferences. What type of data collection is involved here ?
All of these choices are true
Which of the following statements is true regarding the design of a good survey ?
Direct observation
Which method of data collection is involved when a researcher counts and records the number of
students wearing backpacks on campus on a given day ?
WITH COMPLETE SOLUTIONS
inferential statistics
You take a random sample of 100 students at your university and find that their average GPA is 3.. If you
use this information to help you estimate the average GPA for all students at your University then you
are doing what branch of Statistics?
Sample
A company has developed a new computer sound card whose average lifetime is unknown, 200 sound
cards are randomly selected from a large production line and tested; their average lifetime is found to be
5 years. The 200 sounds cards represent a
Statistic
A company has developed a new computer sound card whose average lifetime is unknown. In order to
estimate the average, 200 sound cards are randomly selected from a large production line and tested ;
their average lifetime is found to be 5 years. The 5 years represents a
Parameter
A summary measure that is computed from a population is called a
A significance level
Which of the following is a measure of the reliability of a statistical inference?
, doing inferential statistics.
The Process of using sample statistics to draw conclusions about population parameters is called
All registered voters in the state of Michigan
Which of the following represents a population, as opposed to a sample?
the 500 adult pine trees selected at random selected at random from this forest.
A study in underway to determine the average height of all 32000 adult pines trees in a certain national
forest. The heights of 500 randomly selected adult pine tree are measured and analyzed. The sample this
study is
the proportion of times a conclusion about a population will be wrong in the long run
The significance level of statistical inference measures
the proportion of times an estimation procedure will be correct in the long run
The confidence level of a statistical inference measures
A survey
A marketing research firm selects a random sample of adults and asks them a list of questions regarding
their beverage preferences. What type of data collection is involved here ?
All of these choices are true
Which of the following statements is true regarding the design of a good survey ?
Direct observation
Which method of data collection is involved when a researcher counts and records the number of
students wearing backpacks on campus on a given day ?
