Biostatistics Final UPDATED Actual Exam Questions and CORRECT Answers
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Course
Biostatistics
Institution
Biostatistics
Biostatistics Final UPDATED Actual
Exam Questions and CORRECT Answers
A researcher obtains the following dataset (x: 6, 16, 5) what is the cumulative relative
frequency corresponding to the value 10? - CORRECT ANSWER- 6
For which of the following tables is t
Biostatistics Final UPDATED Actual
Exam Questions and CORRECT Answers
A researcher obtains the following dataset (x: 6, 16, 5) what is the cumulative relative
frequency corresponding to the value 10? - CORRECT ANSWER✔✔- 6
For which of the following tables is the Odds Ratio a better approximation of the Risk Ratio -
CORRECT ANSWER✔✔- Table B
in a recent study, we enrolled 100 older individuals livings in a retirement community in
Florida. We suspected.When we tested our sample of 100 participants, their mean IQ was
102. What conclusions should we reach if we use an alpha of .05 - CORRECT
ANSWER✔✔- You should fail to reject the null. This is because by using obtained Z= -1.25
and this is less than the critical z of 1.65.
The specificity of a test is defined as the probability that a person - CORRECT
ANSWER✔✔- without the disease will get a negative test result
What is the difference between ratio and interval - CORRECT ANSWER✔✔- the presence of
a true zero
Which of the following is not a characteristic of the normal distribution? - CORRECT
ANSWER✔✔- the total area under the curve depends upon the mean and standard deviation
statistical and popular populations differ in the following way - CORRECT ANSWER✔✔-
statistical populations consist of characteristics of people, whereas popular populations
consist of people
which of the following statements regarding z scores calculated from observations in any
distribution is true? - CORRECT ANSWER✔✔- the mean of the z scores is 0, the standard
deviation of the z scores is 1
given the following dataset of PSA in 10 men, what is the percentile rank of a PSA value of
2.4? - CORRECT ANSWER✔✔- 45
, an example of a nominal scale is - CORRECT ANSWER✔✔- eye colors
As is commonly known, Kiwi birds are native to New Zealand. An investigator goes to New
Zealand and finds four birds. The mean height of the four birds is 4, the median is 3, and the
mode is 2. What is the height of the tallest of the four birds? - CORRECT ANSWER✔✔- 8
based on the following joint probability table for events A and B, which of the following
statements is true? - CORRECT ANSWER✔✔- P(AuB-bar) = .95 and P(A-bar/B-bar) = .542
a unimodal distribution is said to be negatively skewed if - CORRECT ANSWER✔✔- (∑z^3
)/n<0
The fact that the sampling distribution of tends to be normally distributed even in situations
where x is not normally distributed is attributed to the - CORRECT ANSWER✔✔- central
limit theorem
For which of the following scales would a cumulative relative frequency distribution not be
appropriate - CORRECT ANSWER✔✔- nominal
which one of the following is an example of a statistical population - CORRECT
ANSWER✔✔- all birthdates of students in a given class
in contrast to descriptive statistics, inferential statistics deal with - CORRECT ANSWER✔✔-
the use of statistics to arrive at conclusions regarding parameters
the analyses we conduct in biostats are based on what is observed. Other characteristics that
we do not observe are extraneous to our analyses and tests. Therefore, what we are studying
is not the people themselves, but rather some observable characteristics of these people. IN
that sense, we are studying - CORRECT ANSWER✔✔- statistical populations
what measures of central tendency is appropriate for describing a set of nominal data? -
CORRECT ANSWER✔✔- mode
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