BMAL RESEARCH TECHNIQUES AND
STATISTICS EXAM QUESTIONS AND
ANSWERS. VERIFIED 2025/2026.
You take a random sample of 100 students at your university and find that their average GPA is
3.1. 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? - ANS Inferential statistics
A company has developed a new computer sound card whose average lifetime is unknown. In
order to estimate this average, 200 sound cards are randomly selected from a large production
line and tested; their average lifetime is found to be 5 years. The 200 sound cards represent a -
ANS Sample
A company has developed a new computer sound card whose average lifetime is unknown. In
order to estimate this average, 200 sound cards are randomly selected from a large production
line and tested; their average lifetime is found to be 5 years. The five years represents a -
ANS Statistic
A summary measure that is computed from a population is called a - ANS Parameter
Which of the following is a measure of the reliability of a statistical interference - ANS A
significance level
The process of using statistics to draw conclusions about population parameters is called -
ANS Doing inferential statistics
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Which of the following represents a population, as opposed to a sample - ANS All registered
voters in the state of michigan
A study in under way to determine the average height of all 32,000 adult pine trees in a certain
national forest. The heights of 500 randomly selected adult pine trees are measured and
analyzed. The sample in this study is - ANS The 500 adult pine trees selected at random
selected at random from this forest.
The significance level of a statistical inference measures - ANS The proportion of times a
conclusion about a population will be wrong in the long run
The confidence level of a statistical inference measures - ANS The proportion of times an
estimation procedure will be correct in the long run
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? - ANS A
survey
Which of the following statements is true regarding the design of a good survey? - ANS All of
these choices are true
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? - ANS Direct observation
The difference between a sample mean and the population mean is called - ANS Sampling
error
The manager of the customer service division of a major consumer electronics company is
interested in determining whether the customers who have purchased a videocassette recorder
over the past 12 months are satusfied with their products. If there are four different brands of
videocassette recorders made by the company, the best sampling strategy would be to use a -
ANS Stratified random sample
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
STATISTICS EXAM QUESTIONS AND
ANSWERS. VERIFIED 2025/2026.
You take a random sample of 100 students at your university and find that their average GPA is
3.1. 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? - ANS Inferential statistics
A company has developed a new computer sound card whose average lifetime is unknown. In
order to estimate this average, 200 sound cards are randomly selected from a large production
line and tested; their average lifetime is found to be 5 years. The 200 sound cards represent a -
ANS Sample
A company has developed a new computer sound card whose average lifetime is unknown. In
order to estimate this average, 200 sound cards are randomly selected from a large production
line and tested; their average lifetime is found to be 5 years. The five years represents a -
ANS Statistic
A summary measure that is computed from a population is called a - ANS Parameter
Which of the following is a measure of the reliability of a statistical interference - ANS A
significance level
The process of using statistics to draw conclusions about population parameters is called -
ANS Doing inferential statistics
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Which of the following represents a population, as opposed to a sample - ANS All registered
voters in the state of michigan
A study in under way to determine the average height of all 32,000 adult pine trees in a certain
national forest. The heights of 500 randomly selected adult pine trees are measured and
analyzed. The sample in this study is - ANS The 500 adult pine trees selected at random
selected at random from this forest.
The significance level of a statistical inference measures - ANS The proportion of times a
conclusion about a population will be wrong in the long run
The confidence level of a statistical inference measures - ANS The proportion of times an
estimation procedure will be correct in the long run
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? - ANS A
survey
Which of the following statements is true regarding the design of a good survey? - ANS All of
these choices are true
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? - ANS Direct observation
The difference between a sample mean and the population mean is called - ANS Sampling
error
The manager of the customer service division of a major consumer electronics company is
interested in determining whether the customers who have purchased a videocassette recorder
over the past 12 months are satusfied with their products. If there are four different brands of
videocassette recorders made by the company, the best sampling strategy would be to use a -
ANS Stratified random sample
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
