Sample Questions

Question 1

Which type of plot would the most useful for visualizing data density, or the distribution of data?

Answer 1

Histogram

Question 2

Which type of plot would the most useful for visualizing data density, or the distribution of data?

Answer 2

Histogram

Question 3

Suppose a data set only has two values. What can we say about the relationship in between the mean and the median?

Answer 3

Mean = median

Question 4

Consider a population data set. One, two, three, four, 10 what are the mean and variance?

Answer 4

Mean = 4 Var =10

Question 5

A company records, the commuting distance of all of its 42 employees. By mistake the smallest commute distance is recorded as 1 mile instead of 10 miles. Compare the recorded median using 1 mile and the actual median 10 miles.

Answer 5

The recorded median will be the same as the actual median

Question 6

Suppose we’re interested in estimating the malaria rates in a dense tropical portion of a south eastern country. We learn there are 30 villages in that part of the jungle each more or less similar to the next our goal to test 150 individuals for what sampling method should be employed?

Answer 6

Cluster sampling