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BSNS 112 MIDTERM AND FINAL EXAM NEWEST ACTUAL EXAM COMPLETE 300 QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)

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BSNS 112 MIDTERM AND FINAL EXAM NEWEST ACTUAL EXAM COMPLETE 300 QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) What does quantitative data use? - answerMeans What is discrete data? - answerQuantitative. Measured in specific values What is continuous data? - answerQuantitative. Measure in ...

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©THEBRIGHT EXAM SOLUTIONS

11/05/2024 12:06 PM


BSNS 112 MIDTERM AND FINAL EXAM
NEWEST 2024-2025 ACTUAL EXAM
COMPLETE 300 QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS)


What does quantitative data use? - answer✔Means

What is discrete data? - answer✔Quantitative. Measured in specific values

What is continuous data? - answer✔Quantitative. Measure in infinite values

What does qualitative data use? - answer✔Proportions

What is ordinal data? - answer✔Qualitative. Conveys a ranking

What is nominal data? - answer✔Qualitative. Uses labels (no ranking)

What variables does a cross tabulation table use? - answer✔Categorical and categorical

What variables does a scatter plot use? - answer✔Numerical and numerical

What variable(s) does a frequency table use? - answer✔One categorical variable

What variables does a stacked/clustered bar chart use? - answer✔Categorical and categorical

What variables does a relative frequency histogram use? - answer✔Categorical and numerical

Define mean - answer✔Simple average

Define median - answer✔Middle value when data is ranked

Define mode - answer✔Most frequent value

Define trimmed mean - answer✔Average when most extreme 5% of data is cut

Define range - answer✔maximum - minimum

, ©THEBRIGHT EXAM SOLUTIONS

11/05/2024 12:06 PM

Define interquartile range - answer✔75th percentile - 25th percentile

Define variance - answer✔spread of data around mean (σ²)

What happens when standard deviation increases? - answer✔Graph widens

Define coefficient of variation - answer✔Compares variability between groups with different
magnitudes

Coefficient of variation equation - answer✔SD / x̅ where x̅ is the sample mean

What does it mean by a positively skewed graph? - answer✔Tail trails to the right. Mean > Median >
Mode

What does it mean by a negative skewed graph? - answer✔Tail trails to the left. Mode > Median > Mean

When is a graph significantly skewed? - answer✔Skewness more than twice the standard error

Define kurtosis - answer✔Measure of the extent to which observations cluster around a central point

What is the normal distribution kurtosis value? - answer✔0

Define positive kurtosis - answer✔Data clusters more in the centre

Define negative kurtosis - answer✔Data clusters less in the centre

How is cross-sectional data collected? - answer✔By observing many subjects at the same point of time,
or without regard to differences in time

What is time-series data? - answer✔A sequence taken at successive equally spaced points in time
(discrete-time data)

Define association - answer✔How one variable relates to another

Define covariance - answer✔Measure of the co-movement between 2 variables (measured in units)

Define positive covariance - answer✔2 variables move in the same direction

Define negative covariance - answer✔2 variables move in the opposite direction

Define the correlation coefficient - answer✔Measure of the linear relationship between 2 variables
(scaled to equal a value between -1 and +1)

Define positive correlation - answer✔2 variables move in the same linear direction

Define negative correlation - answer✔2 variables move in the opposite linear direction

Define parameter - answer✔A summary measure that describes a characteristic of the population

, ©THEBRIGHT EXAM SOLUTIONS

11/05/2024 12:06 PM

Define statistic - answer✔A summary measure that describes a characteristic of a sample

Define simple random sampling - answer✔Everyone is equally likely to be chosen from a population

Define systematic random sampling - answer✔Selecting 1 individual from a group and choosing the kth
individual thereafter

Define stratified random sampling - answer✔Dividing the population into homogenous groups of similar
characteristics and selecting a random sample from each group

Define cluster sampling - answer✔Dividing the population into several clusters (that aren't
homogenous), and taking a random sample from each cluster

How are non sampling errors caused? Is it avoidable? - answer✔By how the person samples. It is human
error and is avoidable

What is coverage error? - answer✔Non sampling error. Difference between sample population and
target population (due to self selection or selection bias) — wrong subjects

What is non-response error? - answer✔Non sampling error. Subject from the sample chooses not to
respond and impacts on the data

What is a measurement error? - answer✔Non sampling error. Error in the measurement of the data
through bad questions and misunderstanding

What is a sampling error? And is it avoidable? - answer✔Difference between the sample and population
because of the observations that occurred with the particular sample (unavoidable)

How do you decrease the sampling error? - answer✔Increase the sample size

What is the margin of error? - answer✔A quantified measure of the sampling error; makes the sample
statistic a more accurate measure of the population parameter

How to decrease the margin of error? - answer✔Increase sample size

Define Union - answer✔Probability that one event occurs OR the other

Define intersection - answer✔Probability that both events occur TOGETHER

Define mutually exclusive - answer✔2 events CAN'T occur together

Define collectively exhaustive - answer✔Outcomes given are the only POSSIBLE outcomes

What does it mean when 2 events complement each other? - answer✔Their probabilities add to 1

Define conditional probability - answer✔The probability of an event occurring GIVEN THAT another has
occurred

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