PBSI 245 FINAL EXAM REVIEW QUESTIONS WITH
VERIFIED ACCURATE ANSWERS
What does a 95% confidence interval indicate?
a) This method of producing an interval would provide an interval that does contain the
true population parameter 95% of the time.
b) 95% of the sample data falls within this range.
c) The probability of the interval being correct is 0.05.
d) The interval contains 95% of the data points
A
If a dataset is skewed to the right, which measure of central tendency is typically larger?
a) Mean.
b) Median.
c) Mode.
d) All are equal
A
What is reliability in the context of measurement?
a) Consistency of a measurement.
b) Accuracy of a measurement.
c) Validity of a measurement.
d) Absence of error.
A
Which sampling method divides a population into groups and randomly selects
individuals from each group?
a) Cluster sampling.
b) Stratified random sampling.
, c) Voluntary response sampling.
d) Random sampling
B
What does a p-value represent?
a) The probability that the null hypothesis is true.
b) The probability of observing the sample data given the null hypothesis is true.
c) The level of confidence in the sample.
d) The probability of making a Type I error.
B
Which of the following is true of a normal distribution?
a) It is skewed to the right.
b) The mean, median, and mode are the same.
c) It has two peaks.
d) The data are evenly distributed across all values.
B
What type of variable is best visualized using a histogram?
a) Nominal.
b) Ordinal.
c) Numerical.
d) Categorical
C
What does the slope in a regression equation represent?
a) The intercept value.
VERIFIED ACCURATE ANSWERS
What does a 95% confidence interval indicate?
a) This method of producing an interval would provide an interval that does contain the
true population parameter 95% of the time.
b) 95% of the sample data falls within this range.
c) The probability of the interval being correct is 0.05.
d) The interval contains 95% of the data points
A
If a dataset is skewed to the right, which measure of central tendency is typically larger?
a) Mean.
b) Median.
c) Mode.
d) All are equal
A
What is reliability in the context of measurement?
a) Consistency of a measurement.
b) Accuracy of a measurement.
c) Validity of a measurement.
d) Absence of error.
A
Which sampling method divides a population into groups and randomly selects
individuals from each group?
a) Cluster sampling.
b) Stratified random sampling.
, c) Voluntary response sampling.
d) Random sampling
B
What does a p-value represent?
a) The probability that the null hypothesis is true.
b) The probability of observing the sample data given the null hypothesis is true.
c) The level of confidence in the sample.
d) The probability of making a Type I error.
B
Which of the following is true of a normal distribution?
a) It is skewed to the right.
b) The mean, median, and mode are the same.
c) It has two peaks.
d) The data are evenly distributed across all values.
B
What type of variable is best visualized using a histogram?
a) Nominal.
b) Ordinal.
c) Numerical.
d) Categorical
C
What does the slope in a regression equation represent?
a) The intercept value.
