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STA 220: Statistics (4224_J101), Quizzes of Statistics

STA 220: Statistics (4224_J101) complete quiz

Typology: Quizzes

2021/2022

Available from 08/31/2022

ashish-paliwal
ashish-paliwal 🇺🇸

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1. Question 1
1/1
A bored fourth grader makes a paper airplane and flies it 20 times. She records the
distances, in inches, in the table below. Use the paper airplane flight distances to
calculate the numerical measures in problems 1-8.
Paper Airplane Flight Distances (inches)
84 49 42 48 106 64 45 152 64 44 43 38 30 40 42 96 42 87 97 61
Calculate the mean. Round your answer to the nearest one decimal place.
Your Answer:63.7
2. Question 2
1/1
Calculate the median. Round your answer to the nearest one decimal place.
Your Answer:48.5
3. Question 3
1/1
Calculate the mode. Enter your answer as a whole number.
Your Answer:42
4. Question 4
1/1
Calculate the variance. Round your answer to the nearest two decimal places.
Your Answer:952.64
5. Question 5
1/1
Calculate the standard deviation. Round your answer to the nearest two decimal
places.
Your Answer:30.86
6. Question 6
1/1
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  1. Question 1 1/ A bored fourth grader makes a paper airplane and flies it 20 times. She records the distances, in inches, in the table below. Use the paper airplane flight distances to calculate the numerical measures in problems 1-8. Paper Airplane Flight Distances (inches) 84 49 42 48 106 64 45 152 64 44 43 38 30 40 42 96 42 87 97 61 Calculate the mean. Round your answer to the nearest one decimal place. Your Answer: 63.
  2. Question 2 1/ Calculate the median. Round your answer to the nearest one decimal place. Your Answer: 48.
  3. Question 3 1/ Calculate the mode. Enter your answer as a whole number. Your Answer: 42
  4. Question 4 1/ Calculate the variance. Round your answer to the nearest two decimal places. Your Answer: 952.
  5. Question 5 1/ Calculate the standard deviation. Round your answer to the nearest two decimal places. Your Answer: 30.
  6. Question 6 1/

Calculate the first quartile. Round your answer to the nearest two decimal places. Your Answer: 42

  1. Question 7 1/ Calculate the third quartile. Round your answer to the nearest two decimal places. Your Answer: 85.
  2. Question 8 1/ Calculate the interquartile range (IQR). Round your answer to the nearest two decimal places. Your Answer: 43.
  3. Question 9 1/ What percentage of the values in any data set fall above the third quartile? Hide answer choices
  4. 0%
  5. 25% Answer
  6. 50%
  7. 75%
  8. Question 10 1/

Right-skewed

None of the above

  1. Question 12 1/ How does the mean compare to median? Hide answer choices
  2. Mean = Median
  3. Mean > Median
  4. Mean < Median
  5. Impossible to tell without calculating
  6. Question 13 1/ Would the mean or median be a more representative measure of “typical” for this data set? Why? Hide answer choices

The median is more representative of a typical value when a data set is skewed or has outliers.

The mean is more representative of a typical value when a data set is skewed or has outliers.

The median is more representative of a typical value because it's in the middle.

The mean is more representative of a typical value because it uses all the data values.

  1. Question 14 1/ Use the boxplots below to answer questions 14-15. Which city has the lowest median house price? Hide answer choices
  2. City 1
  3. City 2
  4. City 3
  5. None of the above