Statistics — Quiz 1

Questions in this quiz (10)

1. What is the median of the set of numbers 5, 6, 7, 8, 9, 10, and 11?

   • 8
   • 9
   • 8.5
   • 7

2. If the median of seven consecutive odd integers is 35, what is the value of the largest integer?

   • $$32$$
   • $$41$$
   • $$34$$
   • $$35$$

3. The average scores of students on a science project are as shown on the following chart.What is the positive difference between the mean and the median of their scores?

   • 0
   • 2
   • 3
   • 4

4. The ages of the 12 most recent U.S. governors at the time they took office are listed below in order of their elections. Which of the following correctly compares the average (arithmetic mean), median, and mode of their ages?48, 52, 59, 60, 45, 50, 55, 53, 47, 52, 49, 46

   • The mean is greater than the median and the mode
   • The median is greater than the mean and the mode
   • The mode is greater than the mean and the median
   • The mean, median, and mode are equal

5. If two 95% confidence intervals for the mean of a population are of different lengths, the shorter interval most likely corresponds to a sample that has:

   • A larger sample size
   • A smaller sample size
   • A higher confidence level
   • A greater variability in data

6. Suppose you have observed the following values of daily sales of chips at your school: $$40,56,38,38,63,59,52,49,46$$Determine the mode of this data.

   • 52
   • 38
   • 49
   • 40

7. In a music academy, 24 students learn to play music in the Guitar, 25 in the Piano, 16 in the Saxophone, 22 in Drums, 32 in the Trumpet, 15 in the Violin, and 32 in the Woodwind. Find the median.

   • 24.5
   • 22
   • 25
   • 24

8. A student got scores of 85, 90, 75, and 80 on four tests. What score is needed on the fifth test to get an average of 85?

   • 95
   • 85
   • 75
   • 90

9. If the mean of 4 numbers is 10, what is their total sum?

   • 45
   • 40
   • 50
   • 60

10. In a survey, 40% of students said math was their favorite subject. If 50 students were surveyed, how many chose math?

    • 30
    • 40
    • 20
    • 50