Test on Descriptive Statistics Exam Practice
Descriptive Statistics Exam Practice: Your Ultimate Guide
Test: Descriptive Statistics
20 questions
Question 1: For the given data set, the range is 8.
A. Ano
B. Ne
Explanation: To determine the range, subtract the minimum value from the maximum value. The maximum mark is 22 and the minimum mark is 12. Therefore, the range is 22 - 12 = 10.
Question 2: For the provided statistics test scores: 12, 18, 20, 22, 18, 16, 20, 18, 22, 16, 20, 18, the median score is 18.
A. Ano
B. Ne
Explanation: To find the median, first arrange the data in ascending order: 12, 16, 16, 18, 18, 18, 18, 20, 20, 20, 22, 22. There are 12 data points. Since the number of data points is even, the median is the average of the two middle values. The 6th value is 18 and the 7th value is 18. Therefore, the median is (18 + 18) / 2 = 18.
Question 3: For the provided statistics test scores, the number of data points is 12.
A. Ano
B. Ne
Explanation: Counting the individual scores in the given data set (12, 18, 20, 22, 18, 16, 20, 18, 22, 16, 20, 18) reveals there are 12 data points.
Question 4: Based on the provided statistics test data, is presenting the data exclusively in a frequency table the only acceptable method?
A. Ano
B. Ne
Explanation: The study materials state: 'Present the data in a frequency table or construct a bar graph.' This indicates that constructing a bar graph is also an acceptable method for presenting the data, meaning a frequency table is not the exclusive method.
Question 5: The first step in calculating the mean score for the given data is to arrange the marks in ascending order.
A. Ano
B. Ne
Explanation: Calculating the mean score involves summing all the individual scores and then dividing by the total number of scores. Arranging the marks in ascending order is a step typically used for finding the median, not the mean.