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Normal Distribution—Lap Times Quiz

12 questions math Grades 9-12

The question sheet

Reveal any answer as you study
  1. Whose lap times are examined in this activity?

    • Karl Pearson's
    • Nancy's
    • Susan Dean's
    • Terry Vogel's
    Reveal answer

    Answer: Terry Vogel's

    Source evidence

    PDF page 375: • The student will compare and contrast empirical data and a theoretical distribution to determine if Terry Vogel's lap

  2. To how many decimal places should relative frequencies and probabilities be rounded?

    • Two
    • Four
    • Five
    • Three
    Reveal answer

    Answer: Four

    Source evidence

    PDF page 375: times fit a continuous distribution. Directions Round the relative frequencies and probabilities to four decimal places. Carry all other decimal answers to two places. Collect the Data Use the data from Appendix C Data Sets. Use a stratified sampling method by lap— races 1 to 20— and a random number generator to pick six lap times from each stratum. Record the lap times below for laps two to seven.

  3. How should all other decimal answers be carried?

    • To two places
    • To one place
    • To three places
    • To four places
    Reveal answer

    Answer: To two places

    Source evidence

    PDF page 375: times fit a continuous distribution. Directions Round the relative frequencies and probabilities to four decimal places. Carry all other decimal answers to two places. Collect the Data Use the data from Appendix C Data Sets. Use a stratified sampling method by lap— races 1 to 20— and a random number generator to pick six lap times from each stratum. Record the lap times below for laps two to seven.

  4. Which sampling method is used to collect the lap times?

    • Simple random sampling
    • Cluster sampling
    • Convenience sampling
    • Stratified sampling by lap
    Reveal answer

    Answer: Stratified sampling by lap

    Source evidence

    PDF page 375: times fit a continuous distribution. Directions Round the relative frequencies and probabilities to four decimal places. Carry all other decimal answers to two places. Collect the Data Use the data from Appendix C Data Sets. Use a stratified sampling method by lap— races 1 to 20— and a random number generator to pick six lap times from each stratum. Record the lap times below for laps two to seven.

  5. How many lap times are picked from each stratum?

    • Four
    • Seven
    • Five
    • Six
    Reveal answer

    Answer: Six

    Source evidence

    PDF page 375: times fit a continuous distribution. Directions Round the relative frequencies and probabilities to four decimal places. Carry all other decimal answers to two places. Collect the Data Use the data from Appendix C Data Sets. Use a stratified sampling method by lap— races 1 to 20— and a random number generator to pick six lap times from each stratum. Record the lap times below for laps two to seven.

  6. Lap times are recorded for which laps?

    • Laps two to seven
    • Laps five to ten
    • Laps one to twenty
    • Laps one to six
    Reveal answer

    Answer: Laps two to seven

    Source evidence

    PDF page 375: times fit a continuous distribution. Directions Round the relative frequencies and probabilities to four decimal places. Carry all other decimal answers to two places. Collect the Data Use the data from Appendix C Data Sets. Use a stratified sampling method by lap— races 1 to 20— and a random number generator to pick six lap times from each stratum. Record the lap times below for laps two to seven.

  7. How many intervals should the histogram have?

    • Ten to twelve
    • Five to six
    • One to two
    • Two to three
    Reveal answer

    Answer: Five to six

    Source evidence

    PDF page 376: Construct a histogram. Make five to six intervals. Sketch the graph using a ruler and pencil. Scale the axes.

  8. After constructing the histogram, what should you draw through the bar tops?

    • A bar of best fit
    • A smooth curve
    • A dotted grid
    • A straight ruled line
    Reveal answer

    Answer: A smooth curve

    Source evidence

    PDF page 376: Draw a smooth curve through the tops of the bars of the histogram. Write one to two complete sentences to describe the general shape of the curve. (Keep it simple. Does the graph go straight across, does it have a V-shape, does it have a hump in the middle or at either end, and so on?) Analyze the Distribution Using your sample mean, sample standard deviation, and histogram to help, what is the approximate theoretical distribution of the data?

  9. To approximate the theoretical distribution, you use your sample mean, histogram, and:

    • Median only
    • Population size
    • Interquartile range
    • Sample standard deviation
    Reveal answer

    Answer: Sample standard deviation

    Source evidence

    PDF page 376: Draw a smooth curve through the tops of the bars of the histogram. Write one to two complete sentences to describe the general shape of the curve. (Keep it simple. Does the graph go straight across, does it have a V-shape, does it have a hump in the middle or at either end, and so on?) Analyze the Distribution Using your sample mean, sample standard deviation, and histogram to help, what is the approximate theoretical distribution of the data?

  10. How is the IQR calculated?

    • Q1 × Q3
    • Q3 + median
    • Q1 + Q3
    • Q3 – Q1
    Reveal answer

    Answer: Q3 – Q1

    Source evidence

    PDF page 376: • IQR = __________. (IQR = Q3 – Q1)

  11. The empirical probability requested concerns lap times more than:

    • 115 seconds
    • 145 seconds
    • 130 seconds
    • 100 seconds
    Reveal answer

    Answer: 130 seconds

    Source evidence

    PDF page 376: • The empirical probability that a randomly chosen lap time is more than 130 seconds is _______.

  12. For the theoretical distribution, what approximation should be used?

    • A uniform approximation
    • A binomial approximation
    • A normal approximation from sample data
    • An exponential approximation
    Reveal answer

    Answer: A normal approximation from sample data

    Source evidence

    PDF page 376: Theoretical Distribution Using the theoretical distribution, complete the following statements. You should use a normal approximation based on your sample data.

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