STATISTICS INTERPRETATION REVIEW PAPER
ANSWERS COMPLETE LEARNING PACK
◉ Confusion of association and causality
Answer: A researcher concludes that bananas create healthy
children because the researcher's notes indicate that children who
eat a banana every day are healthy.
Which misuse of statistics would this study be an example of if these
children also eat a balanced diet and exercise daily?
◉ Does a causal relationship truly exist?
Answer: In the month of December, there is a strong positive
correlation between airline ticket sales and retail sales.
Which question should the researcher consider before concluding
that the correlation statistic implies that airline sales drive retail
sales?
◉ Intersection
Multiplication principle
,Answer: A medical care provider determines the probability that a
patient needs treatment for a broken bone, the probability that a
patient needs treatment for a concussion, and the probability that a
patient needs treatment for both a broken bone and a concussion.
Which two techniques apply in finding the probability that a patient
needs treatment for a broken bone and a concussion?
Choose 2 answers
◉ Bayes' Theorem
Answer: A hardware store has found that there is a 0.25 probability
that a customer buys an electrical product, a 0.45 probability that a
customer buys a plumbing product, and a 0.10 probability that a
customer buys an electrical part if they purchase a plumbing part.
Given this information, which statistical rule can be used to
determine the probability that a customer buys a plumbing product
given that this customer has purchased an electrical product?
◉ 12
Answer: Given the following data set:
9 12 14 10 8 11 12
, What is the mode?
◉ Scatterplot
Answer: Which graphical tool is used to illustrate a possible
relationship or correlation between two variables?
◉ The data point is two standard deviations less than the mean of
the data set
Answer: What does it mean when an individual data point has a z-
score of -2?
◉ The advertisement was effective in building brand awareness.
Answer: A research study examined the impact of product
advertisement exposure on that product's brand awareness. The
appropriate statistical test indicates that the null hypothesis should
be rejected with 95% confidence.
What can be concluded from this study?
◉ Median
Answer: A manager is analyzing a dataset that includes information
on individual incomes. The manager knows that the dataset is fairly