DA0-001 Practice Test

DA0-001 Practice Test practice questions, page 11 of 17, with answer review and explanations.

Question 51

A table in a hospital database has a column for patient height in inches and a column for patient height in centimeters. This is an example of:

  1. dependent data.
  2. duplicate data.
  3. invalid data
  4. redundant data

Question 52

While reviewing survey data, a research analyst notices data is missing from all the responses to a single question. Which of the following methods would BEST address this issue?

  1. Replace missing data.
  2. Remove duplicate data.
  3. Replace redundant data.
  4. Remove invalid data.

Question 53

Which of the following BEST describes standard deviation?

  1. A measure that is used to establish a relationship between two variables
  2. A measure of how data is distributed
  3. A measure of the amount of dispersion of a set of values
  4. A measure that is used to find the significant difference between variables

Question 54

A data analyst was asked to create a chart that shows the relationship between study hours and exam scores for each student using the data sets in the table below: Which of the following charts would BEST represent the relationship between the variables?

  1. A histogram
  2. A scatter plot
  3. A heat map
  4. A bar chart

Question 55

Given the table below: Which of the following variable types BEST describes the “Year” column?

  1. Numeric
  2. Date
  3. Alphanumeric
  4. Text