Data Analysis Quiz

Determine which of the following best describes the association of this dataset:

• Positive, linear

• Positive, non-linear

• Negative, linear

• Negative, non-linear

Which of the following is a categorical variable?

• Favourite movie

• Time spent at work every day

• Weekly income

• Average movie length

If R² is 45%, in the relation between weekly expenditure on entertainment and annual salary, which of the following can be said?

• 45% of variation in the weekly expenditure on entertainment can be explained by the variation in income.

• 55% of variation in the weekly expenditure on entertainment can be explained by the variation in income.

• 45% of variation in the weekly expenditure on entertainment cannot be explained by the variation in income.

• There is no relationship between entertainment and annual salary

There is a strong positive correlation between the temperature and use of electricity in towns. Is there a possible causation?

• Yes

• No

There is a strong positive correlation between the rainfall and number of monkeys in a forest. Does this mean that monkeys determine rainfall?

• Yes

• No

Brian will borrow $45000 from a bank. His loan will be charged compound interest at the rate of 8.76% per annum, compounding monthly. Brian will repay the loan with monthly repayments of $700.

Using the annuities formula, what is the balance of Brian’s loan after two years?

• $28 105.24

• $29 846.17

• $30 215.89

• $32 817.41

• $35 293.85

An annuity has principal $0 and monthly deposits of $410. Interest is earned at the annual percentage rate of interest of 2.05%. Using the annuities formula, the balance of this annuity after five years is closest to

• $25,012

• $25,882

• $26,100

• $26,289

• $26,538

Nathan wants to pay the membership fees of $230 per quarter of his local cricket club. He plans to pay the membership fees through perpetuity. Which rate of interest should he choose to minimize the investment? Assume that all the interest rates are compounded quarterly.

• 5.2%

• 7.3%

• 6.4%

• None of the above

An adjacency matrix is made for a graph. Determine the value of Deg(B).

• 1

• 2

• 3

• 4

Which pair of vertices have multiple edges between them?

• A and B

• A and E

• B and C

• B and D

• C and D