Firefighter 2 Final Exam UPDATED Exam Questions and CORRECT Answers
If a hypothesis is rejected at the 5% level of significance, it - (answer)may be rejected or not rejected at
the 1% level
The difference between the observed value of the dependent variable and the value predicted by using
the estimated regression equation is the _____. - (answer)residual
Random samples of size 525 are taken from a process (an infinite population) whose population
proportion is .3. The standard deviation of the sample proportions (i.e., the standard error of the
proportion) is _____ - (answer).0200
The standard deviation of bar(x) is referred to as the _____. - (answer)standard error of the mean
The mean of the t distribution is _____ - (answer)0
In hypothesis testing, if the null hypothesis has been rejected when the alternative hypothesis has been
true, _____. - (answer)the correct decision has been made
Compared to the confidence interval estimate for a particular value of y (in a linear regression model),
the interval estimate for an average value of y will be _____. - (answer)narrower
The general form of an interval estimate of a population mean or population proportion is the _____
plus or minus the _____. - (answer)point estimate, margin of error
Which of the following is an example of a nonprobability sampling technique? - (answer)judgment
sampling
The standard deviation of all possible bar(x) values is called the _____. - (answer)standard error of the
mean
, Firefighter 2 Final Exam UPDATED Exam Questions and CORRECT Answers
The expected value of the random variable bar(x)is - (answer)μ
A theorem that allows us to use the normal probability distribution to approximate the sampling
distribution of sample means and sample proportions whenever the sample size is large is known as the
_____. - (answer)central limit theorem
In a residual plot against x that does NOT suggest we should challenge the assumptions of our regression
model, we would expect to see a _____ - (answer)horizontal band of points centered near 0
If the margin of error in an interval estimate of μ is 4.6, the interval estimate equals _____. - (answer)x
bar + or - 4.6
The standard deviation of bar(p) is referred to as the _____. - (answer)standard error of the proportion
In the linear trend equation, T = b0 + b1t, b0 represents the _ - (answer)y-intercept
Which of the following is a point estimator? - (answer)s
If we consider the simple random sampling process as an experiment, the sample mean is ____ -
(answer)a random variable
The level of significance is the _____. - (answer)maximum allowable probability of Type I error
The time series pattern that exists when the data fluctuate around a constant mean is the _____. -
(answer)horizontal pattern
If a hypothesis is rejected at the 5% level of significance, it - (answer)may be rejected or not rejected at
the 1% level
The difference between the observed value of the dependent variable and the value predicted by using
the estimated regression equation is the _____. - (answer)residual
Random samples of size 525 are taken from a process (an infinite population) whose population
proportion is .3. The standard deviation of the sample proportions (i.e., the standard error of the
proportion) is _____ - (answer).0200
The standard deviation of bar(x) is referred to as the _____. - (answer)standard error of the mean
The mean of the t distribution is _____ - (answer)0
In hypothesis testing, if the null hypothesis has been rejected when the alternative hypothesis has been
true, _____. - (answer)the correct decision has been made
Compared to the confidence interval estimate for a particular value of y (in a linear regression model),
the interval estimate for an average value of y will be _____. - (answer)narrower
The general form of an interval estimate of a population mean or population proportion is the _____
plus or minus the _____. - (answer)point estimate, margin of error
Which of the following is an example of a nonprobability sampling technique? - (answer)judgment
sampling
The standard deviation of all possible bar(x) values is called the _____. - (answer)standard error of the
mean
, Firefighter 2 Final Exam UPDATED Exam Questions and CORRECT Answers
The expected value of the random variable bar(x)is - (answer)μ
A theorem that allows us to use the normal probability distribution to approximate the sampling
distribution of sample means and sample proportions whenever the sample size is large is known as the
_____. - (answer)central limit theorem
In a residual plot against x that does NOT suggest we should challenge the assumptions of our regression
model, we would expect to see a _____ - (answer)horizontal band of points centered near 0
If the margin of error in an interval estimate of μ is 4.6, the interval estimate equals _____. - (answer)x
bar + or - 4.6
The standard deviation of bar(p) is referred to as the _____. - (answer)standard error of the proportion
In the linear trend equation, T = b0 + b1t, b0 represents the _ - (answer)y-intercept
Which of the following is a point estimator? - (answer)s
If we consider the simple random sampling process as an experiment, the sample mean is ____ -
(answer)a random variable
The level of significance is the _____. - (answer)maximum allowable probability of Type I error
The time series pattern that exists when the data fluctuate around a constant mean is the _____. -
(answer)horizontal pattern
