WPC 300 EXAM 2 QUESTIONS WITH 100% CORRECT
SOLUTIONS, PASSED!!
The ______ is the observation that occurs most frequently. Answer - mode
Which of the following is an example of a measure of dispersion? Answer -
variance
For a normal distribution mean is ____ to median. Answer - equal
Which of the following describes a positively skewed histogram? Answer - a
histogram that tails off towards the right
According to statistical notation, what does ∑ stand for? Answer - to act as a
summation operator
Standard deviation of a normal data distribution is a _____. Answer - measure
of data dispersion
When two variable are highly positively correlated, the correlation coefficient
will be _____. Answer - close to 1
Which of the following is true for a median? Answer - For an even number of
observations, the median is the mean of the two middle numbers.
, The difference between the first and third quartiles is referred to as the ____.
Answer - interquartile range
Which of the following is an example for a sample? Answer - The number of IT
employees out of all employees working in an office of Google.
You are collecting data via an online survey to improve education standard at
ASU. Which of the following methods will not result in data collection bias?
Answer - Anonymously data collection by hiding ASU brand in the survey
question.
Which of the following proposition describes an existing theory or belief?
Answer - Null hypothesis
Which of the following is a Type-I error? Answer - The null hypothesis is
actually true, but the hypothesis test incorrectly rejects it.
What is the confidence interval when the level of significance is 0.07? Answer -
0.930
The central limit theorem states that if the population is normally distributed,
then the Answer - sampling distribution of the mean will also be normal for
any sample size
The WPC Sports Company has noted that the size of individual "customer
order" is normally distributed with a mean of $100 and standard deviation of
$12. If a soccer team of 16 players were to make the next batch of orders, what
would be the standard error of the mean? Answer - 3 (12/sqrt(16)=12/4=3)
SOLUTIONS, PASSED!!
The ______ is the observation that occurs most frequently. Answer - mode
Which of the following is an example of a measure of dispersion? Answer -
variance
For a normal distribution mean is ____ to median. Answer - equal
Which of the following describes a positively skewed histogram? Answer - a
histogram that tails off towards the right
According to statistical notation, what does ∑ stand for? Answer - to act as a
summation operator
Standard deviation of a normal data distribution is a _____. Answer - measure
of data dispersion
When two variable are highly positively correlated, the correlation coefficient
will be _____. Answer - close to 1
Which of the following is true for a median? Answer - For an even number of
observations, the median is the mean of the two middle numbers.
, The difference between the first and third quartiles is referred to as the ____.
Answer - interquartile range
Which of the following is an example for a sample? Answer - The number of IT
employees out of all employees working in an office of Google.
You are collecting data via an online survey to improve education standard at
ASU. Which of the following methods will not result in data collection bias?
Answer - Anonymously data collection by hiding ASU brand in the survey
question.
Which of the following proposition describes an existing theory or belief?
Answer - Null hypothesis
Which of the following is a Type-I error? Answer - The null hypothesis is
actually true, but the hypothesis test incorrectly rejects it.
What is the confidence interval when the level of significance is 0.07? Answer -
0.930
The central limit theorem states that if the population is normally distributed,
then the Answer - sampling distribution of the mean will also be normal for
any sample size
The WPC Sports Company has noted that the size of individual "customer
order" is normally distributed with a mean of $100 and standard deviation of
$12. If a soccer team of 16 players were to make the next batch of orders, what
would be the standard error of the mean? Answer - 3 (12/sqrt(16)=12/4=3)
