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MATH 120: Introduction to Statistics - Week 5 Quiz with Answers, Exams of Statistics

Arizona State University (ASU) - West CampusStatistics

A quiz for math 120: introduction to statistics, covering topics such as variance, standard deviation, percentiles, covariance, and probability distributions. It includes multiple-choice questions with answers, providing a valuable resource for students to test their understanding of key concepts in statistics.

Typology: Exams

2023/2024

Available from 11/10/2024

calleb-kahuro
calleb-kahuro 🇺🇸

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MATH 120: Introduction to Statistics. LATEST 2024/2025
Week 5 QUIZ WITH ACCURATE ANSWERS. VERIFIED.
1. Using the test scores in the table below, what is the variance of the scores on the exam? (Round
your answer to the nearest whole number.)<br />
A: 27
2. Using the test scores in the table below, what is the standard deviation of the scores on the
exam? (Round your answer to the nearest whole number.)
A: 5
3. Assume that 500,000 people take the GED exam (high school proficiency exam) each year and
their scores form a normal distribution. If Danny scores two standard deviations below the
mean, what percentile is he?
A: 2.5th
4. Assume that 500,000 people take the GED exam (high school proficiency exam) each year and
their scores form a normal distribution. If Tara scores one standard deviation above the mean,
what percentile is she?
A: 84th
5. Assume that 20 people take a math test, which is not enough for a normal distribution to form. If
Conrad scores three standard deviations above the mean, what percentile is he?
pf3

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Download MATH 120: Introduction to Statistics - Week 5 Quiz with Answers and more Exams Statistics in PDF only on Docsity!

MATH 120: Introduction to Statistics. LATEST 2024/

Week 5 QUIZ WITH ACCURATE ANSWERS. VERIFIED.

  1. Using the test scores in the table below, what is the variance of the scores on the exam? (Round your answer to the nearest whole number.)
    A: 27
  2. Using the test scores in the table below, what is the standard deviation of the scores on the exam? (Round your answer to the nearest whole number.) A: 5
  3. Assume that 500,000 people take the GED exam (high school proficiency exam) each year and their scores form a normal distribution. If Danny scores two standard deviations below the mean, what percentile is he? A: 2.5th
  4. Assume that 500,000 people take the GED exam (high school proficiency exam) each year and their scores form a normal distribution. If Tara scores one standard deviation above the mean, what percentile is she? A: 84th
  5. Assume that 20 people take a math test, which is not enough for a normal distribution to form. If Conrad scores three standard deviations above the mean, what percentile is he?

A: Not enough information to determine.

  1. Assume that 20 people take a math test, which is not enough for a normal distribution to form. If Sarah scores at the median, what percentile is she? A: 50th
  2. Assume that 20 people take a math test, which is not enough for a normal distribution to form. If Charlie scores at the mean, what percentile is he? A: Not enough information to determine.
  3. Compare the times of the two marathons runners in the table below. Which marathon runner is more likely to win the marathon on any given day? A: Runner 2
  4. Compare the times of the two marathons runners in the table below. Which marathon runner has a higher variance in her performance? A: Runner 1
  5. Typically, in the early stages of a country's transition from an emerging nation to a developed nation, death rates fall while birth rates stay constant. What type of covariance do death rates and birth rates have?