PUBH 349L Q4? EXAM QUESTIONS WITH
ACCURATE ANSWERS
In data collection and analysis, when can bias be introduced in our sample data? -
ANSWER Some samples are underseleted and overselected
When is sample data said to be unbiased? - ANSWER Samples are randomly selected
from the population.
Statistics from the sample is not different from that of the population
Samples truly represent the population.
Every unit in the population has equal chance of being part of the sample.
Someone claims that males diagnosed with lung cancer spend more duration to start
treatment than females. What statement of hypothesis test does the claim represent? -
ANSWER alternative
What would be the direct implication for the hypothesis test if zero is not included in the
95% confidence interval? - ANSWER P-value is expected to be less than the level of
significance.
The hypothesis test is expected to be statistically significant.
P-value could equal level of significance.????
You are performing a hypothesis test with a 1% level of significance for a one-tailed test.
What would be the level of confidence if you have to construct a confidence interval? -
ANSWER 99%
The president of a State Health Department claims that at least 50% of hospitalized
COVID-19 patients have an existing illness. What statement of hypothesis test does the
claim represent? - ANSWER NOT inferential
NOT alternative
either null, type 1, or type 2,
A medical doctor claimed that the age distribution of patients diagnosed with HIV does
not follow a normal distribution. What type of statistical test would you use to investigate
his claim? - ANSWER Kolmogorov Smirnov test of normality
What type of statistical outcome error is committed if the null hypothesis is true, but the
test is statistically significant? - ANSWER false pos
,type 1 error
A medical research department is interested to investigate whether the glucose or
blood sugar level of a patient can influence his/her blood pressure level. You are
recruited as a consultant to this medical department to assist in the investigation. What
statistical tool will you recommend for the analysis of this problem? - ANSWER simple
linear
What type of statistics uses random samples drawn from the population to describe and
make conclusions or inferences about the population. - ANSWER inferential
The robustness or power of any statistical inference in data analysis cannot be
influenced by the sample size used. That is, the inference from a small sample can be as
robust as a large sample data. - ANSWER f
In hypothesis testing, we commit Type II error if the alternative hypothesis is true but the
test failed to reject the null hypothesis. That is, the test is not statistically significant. -
ANSWER t
If zero is included in the 95% interval, it means that we are failing to reject the null
hypothesis, hence, the test is not statistically significant. - ANSWER t
The data given below represents the K-12 students in a particular disease screening
test.
13, 18, 15, 15, 13, 14, 13, 16, 14, 21, 13, 15, 18, 16, 16.
What is the modal age?
Group of answer choices - ANSWER 13
Consider the following sample:
12, 4, 5, 18, 11, 10, 8, 6, 5, 14, 11, 5, 3, 11, 5, 12
Match the correct figure with each of the mean, median, and mode, and identify which of
the answers is false (i.e. not a measure of central tendency for this sample). - ANSWER
mean: 8.75
mode: 5
median: 9
false: 11
A right-skewed data have the following features. - ANSWER mean greater
large right
The central tendency of descriptive statistics of data describes the .................. of the
data. - ANSWER center
, It is difficult to interpret whether a distribution deviates from normality when using a: -
ANSWER box and whisker
The dispersion within a given data is assessed by the measures of variability. - ANSWER
f
We use descriptive statistics to describe our samples, as well as population. - ANSWER t
Which of the following level of measurement is a categorical or qualitative variable? -
ANSWER ordinal, nominal
The median of data also measures the 50th percentile of the data. - ANSWER t
The data given below represents the K-12 students in a particular disease screening
test.
13, 18, 15, 15, 13, 14, 13, 16, 14, 21, 13, 15, 18, 16, 16.
If you are asked to compute the 25% trimmed mean for this data, how many data values
would you trim?
Group of answer choices - ANSWER 4
11, 19, 19, 20, 21, 24, 25, 25, 36
You are creating a box and whisker plot to describe this data. What would the inner
fence or median be? - ANSWER 21
If the mean, median, and mode of a data are equal, the data is said to be normally
distributed. - ANSWER t
Consider the following data set for the next three questions:
14, 23, 9, 12, 21, 18, 8
What is the range?
Group of answer choices - ANSWER 15
The Q2 of the five-number summary is also referred to as - ANSWER median, 2nd
quartile, 50th percentiles, 50% mark
ACCURATE ANSWERS
In data collection and analysis, when can bias be introduced in our sample data? -
ANSWER Some samples are underseleted and overselected
When is sample data said to be unbiased? - ANSWER Samples are randomly selected
from the population.
Statistics from the sample is not different from that of the population
Samples truly represent the population.
Every unit in the population has equal chance of being part of the sample.
Someone claims that males diagnosed with lung cancer spend more duration to start
treatment than females. What statement of hypothesis test does the claim represent? -
ANSWER alternative
What would be the direct implication for the hypothesis test if zero is not included in the
95% confidence interval? - ANSWER P-value is expected to be less than the level of
significance.
The hypothesis test is expected to be statistically significant.
P-value could equal level of significance.????
You are performing a hypothesis test with a 1% level of significance for a one-tailed test.
What would be the level of confidence if you have to construct a confidence interval? -
ANSWER 99%
The president of a State Health Department claims that at least 50% of hospitalized
COVID-19 patients have an existing illness. What statement of hypothesis test does the
claim represent? - ANSWER NOT inferential
NOT alternative
either null, type 1, or type 2,
A medical doctor claimed that the age distribution of patients diagnosed with HIV does
not follow a normal distribution. What type of statistical test would you use to investigate
his claim? - ANSWER Kolmogorov Smirnov test of normality
What type of statistical outcome error is committed if the null hypothesis is true, but the
test is statistically significant? - ANSWER false pos
,type 1 error
A medical research department is interested to investigate whether the glucose or
blood sugar level of a patient can influence his/her blood pressure level. You are
recruited as a consultant to this medical department to assist in the investigation. What
statistical tool will you recommend for the analysis of this problem? - ANSWER simple
linear
What type of statistics uses random samples drawn from the population to describe and
make conclusions or inferences about the population. - ANSWER inferential
The robustness or power of any statistical inference in data analysis cannot be
influenced by the sample size used. That is, the inference from a small sample can be as
robust as a large sample data. - ANSWER f
In hypothesis testing, we commit Type II error if the alternative hypothesis is true but the
test failed to reject the null hypothesis. That is, the test is not statistically significant. -
ANSWER t
If zero is included in the 95% interval, it means that we are failing to reject the null
hypothesis, hence, the test is not statistically significant. - ANSWER t
The data given below represents the K-12 students in a particular disease screening
test.
13, 18, 15, 15, 13, 14, 13, 16, 14, 21, 13, 15, 18, 16, 16.
What is the modal age?
Group of answer choices - ANSWER 13
Consider the following sample:
12, 4, 5, 18, 11, 10, 8, 6, 5, 14, 11, 5, 3, 11, 5, 12
Match the correct figure with each of the mean, median, and mode, and identify which of
the answers is false (i.e. not a measure of central tendency for this sample). - ANSWER
mean: 8.75
mode: 5
median: 9
false: 11
A right-skewed data have the following features. - ANSWER mean greater
large right
The central tendency of descriptive statistics of data describes the .................. of the
data. - ANSWER center
, It is difficult to interpret whether a distribution deviates from normality when using a: -
ANSWER box and whisker
The dispersion within a given data is assessed by the measures of variability. - ANSWER
f
We use descriptive statistics to describe our samples, as well as population. - ANSWER t
Which of the following level of measurement is a categorical or qualitative variable? -
ANSWER ordinal, nominal
The median of data also measures the 50th percentile of the data. - ANSWER t
The data given below represents the K-12 students in a particular disease screening
test.
13, 18, 15, 15, 13, 14, 13, 16, 14, 21, 13, 15, 18, 16, 16.
If you are asked to compute the 25% trimmed mean for this data, how many data values
would you trim?
Group of answer choices - ANSWER 4
11, 19, 19, 20, 21, 24, 25, 25, 36
You are creating a box and whisker plot to describe this data. What would the inner
fence or median be? - ANSWER 21
If the mean, median, and mode of a data are equal, the data is said to be normally
distributed. - ANSWER t
Consider the following data set for the next three questions:
14, 23, 9, 12, 21, 18, 8
What is the range?
Group of answer choices - ANSWER 15
The Q2 of the five-number summary is also referred to as - ANSWER median, 2nd
quartile, 50th percentiles, 50% mark
