IEE 380 UPDATED EXAM QUESTIONS AND SOLUTIONS
GUARANTEE A+
✔✔Regarding hypothesis testing, alpha is the probability of Type I error. - ✔✔true
✔✔*******
We want to do a hypothesis test on the difference between two population means and
we are told the population standard deviation values for each population. Which test
statistic do we use? - ✔✔not p0
✔✔The standard error of the sample mean is sigma/sqrt(n) - ✔✔true
✔✔********
The number of items in a population _______________. - ✔✔not is always finite
✔✔An experiment that is repeated in the same manner every time but that can result in
different ____________ is called a random experiment. - ✔✔outcomes
✔✔If you were asked to sketch the pdf of a normal random variable, X, you would label
the "y" axis as f(z) - ✔✔false
✔✔**********
A rivet is to be inserted into a hole. A random sample of 15 parts is selected and the
hole diameter is measured. The sample mean is 1.2 mm and the sample standard
deviation is .008 millimeters. Is there strong evidence to indicate that the standard
deviation of hole diameter exceeds 0.01 millimeters?
What is the test statistic that will be used in the hypothesis test? - ✔✔not p0
✔✔What letter is used to denote the number of observations in a finite population? -
✔✔N
✔✔If we wanted to make a histogram from a sample of 100 pieces of data, how many
bins should we have according to the text and the Rule of Thumb? - ✔✔10
✔✔alpha is - ✔✔the probability of Type I error
✔✔Consider this experiment: analysts want to investigate the effect of drying
temperature of wheat grain on baking quality bread. Three temperature levels were
used, and the response variable measured was the volume of the loaf of bread
produced. The data are as follows:
, The total number of loaves of bread used in this experiment is five. True or False? -
✔✔false
✔✔A standard normal random variable is referred to as the letter ________. - ✔✔Z
✔✔Consider this experiment: analysts want to investigate the effect of drying
temperature of wheat grain on baking quality bread. Three temperature levels were
used, and the response variable measured was the volume of the loaf of bread
produced. The data are as follows:
This is a randomized complete block experiment. True or False? - ✔✔false
✔✔Given events E1 and E2: P(A N B) = P(A) + P(B) - P(A U B)
** N = upside down U thing
This equation is also known as the ______________ . - ✔✔Addition Rule
✔✔As the sample size increases, the distribution of the sample mean, X bar,
approaches the ________________ distribution. - ✔✔normal
✔✔An experiment that results in only one of two outcomes is called a
_________________ trial. - ✔✔Bernoulli
✔✔A ___________experiment is one that is repeated in the same manner every time
but that can result in different outcomes. - ✔✔random
✔✔As n goes to infinity, the variance of the sample mean ____________. -
✔✔decreases
✔✔In Chapter 3, the authors use f(x) to denote the probability that a discrete random
variable X (upper case) equals a specific measured numerical value, x, lowercase. In
other words, the text shows f(x) = P(X = x) for X discrete.
What does Dr. Chattin use to denote P(X = x)? - ✔✔p(x)
✔✔H0: β1 = β2 = ... = βι = 0
H1: At least one βi not equal to 0
Fill in the three blanks with three words: We call this hypothesis test the
____________________ ________________ ___________________ test. -
✔✔significance of regression
GUARANTEE A+
✔✔Regarding hypothesis testing, alpha is the probability of Type I error. - ✔✔true
✔✔*******
We want to do a hypothesis test on the difference between two population means and
we are told the population standard deviation values for each population. Which test
statistic do we use? - ✔✔not p0
✔✔The standard error of the sample mean is sigma/sqrt(n) - ✔✔true
✔✔********
The number of items in a population _______________. - ✔✔not is always finite
✔✔An experiment that is repeated in the same manner every time but that can result in
different ____________ is called a random experiment. - ✔✔outcomes
✔✔If you were asked to sketch the pdf of a normal random variable, X, you would label
the "y" axis as f(z) - ✔✔false
✔✔**********
A rivet is to be inserted into a hole. A random sample of 15 parts is selected and the
hole diameter is measured. The sample mean is 1.2 mm and the sample standard
deviation is .008 millimeters. Is there strong evidence to indicate that the standard
deviation of hole diameter exceeds 0.01 millimeters?
What is the test statistic that will be used in the hypothesis test? - ✔✔not p0
✔✔What letter is used to denote the number of observations in a finite population? -
✔✔N
✔✔If we wanted to make a histogram from a sample of 100 pieces of data, how many
bins should we have according to the text and the Rule of Thumb? - ✔✔10
✔✔alpha is - ✔✔the probability of Type I error
✔✔Consider this experiment: analysts want to investigate the effect of drying
temperature of wheat grain on baking quality bread. Three temperature levels were
used, and the response variable measured was the volume of the loaf of bread
produced. The data are as follows:
, The total number of loaves of bread used in this experiment is five. True or False? -
✔✔false
✔✔A standard normal random variable is referred to as the letter ________. - ✔✔Z
✔✔Consider this experiment: analysts want to investigate the effect of drying
temperature of wheat grain on baking quality bread. Three temperature levels were
used, and the response variable measured was the volume of the loaf of bread
produced. The data are as follows:
This is a randomized complete block experiment. True or False? - ✔✔false
✔✔Given events E1 and E2: P(A N B) = P(A) + P(B) - P(A U B)
** N = upside down U thing
This equation is also known as the ______________ . - ✔✔Addition Rule
✔✔As the sample size increases, the distribution of the sample mean, X bar,
approaches the ________________ distribution. - ✔✔normal
✔✔An experiment that results in only one of two outcomes is called a
_________________ trial. - ✔✔Bernoulli
✔✔A ___________experiment is one that is repeated in the same manner every time
but that can result in different outcomes. - ✔✔random
✔✔As n goes to infinity, the variance of the sample mean ____________. -
✔✔decreases
✔✔In Chapter 3, the authors use f(x) to denote the probability that a discrete random
variable X (upper case) equals a specific measured numerical value, x, lowercase. In
other words, the text shows f(x) = P(X = x) for X discrete.
What does Dr. Chattin use to denote P(X = x)? - ✔✔p(x)
✔✔H0: β1 = β2 = ... = βι = 0
H1: At least one βi not equal to 0
Fill in the three blanks with three words: We call this hypothesis test the
____________________ ________________ ___________________ test. -
✔✔significance of regression
