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“Duration (amount of time)” is what type of data?

  • a. qualitative
  • b. quantitative discrete
  • c. quantitative continuous

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The colors of the houses around the park are what kind of data?

  • a. qualitative
  • b. quantitative discrete
  • c. quantitative continuous

a

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The population is ______________________

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[link] contains the total number of deaths worldwide as a result of earthquakes from 2000 to 2012.

Year Total Number of Deaths
2000 231
2001 21,357
2002 11,685
2003 33,819
2004 228,802
2005 88,003
2006 6,605
2007 712
2008 88,011
2009 1,790
2010 320,120
2011 21,953
2012 768
Total 823,856

Use [link] to answer the following questions.

  1. What is the proportion of deaths between 2007 and 2012?
  2. What percent of deaths occurred before 2001?
  3. What is the percent of deaths that occurred in 2003 or after 2010?
  4. What is the fraction of deaths that happened before 2012?
  5. What kind of data is the number of deaths?
  6. Earthquakes are quantified according to the amount of energy they produce (examples are 2.1, 5.0, 6.7). What type of data is that?
  7. What contributed to the large number of deaths in 2010? In 2004? Explain.
  1. 0.5242
  2. 0.03%
  3. 6.86%
  4. 823,088 823,856
  5. quantitative discrete
  6. quantitative continuous
  7. In both years, underwater earthquakes produced massive tsunamis.
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For the following four exercises, determine the type of sampling used (simple random, stratified, systematic, cluster, or convenience).

A group of test subjects is divided into twelve groups; then four of the groups are chosen at random.

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A market researcher polls every tenth person who walks into a store.

systematic

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The first 50 people who walk into a sporting event are polled on their television preferences.

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A computer generates 100 random numbers, and 100 people whose names correspond with the numbers on the list are chosen.

simple random

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Use the following information to answer the next seven exercises: Studies are often done by pharmaceutical companies to determine the effectiveness of a treatment program. Suppose that a new AIDS antibody drug is currently under study. It is given to patients once the AIDS symptoms have revealed themselves. Of interest is the average (mean) length of time in months patients live once starting the treatment. Two researchers each follow a different set of 40 AIDS patients from the start of treatment until their deaths. The following data (in months) are collected.

Researcher A: 3; 4; 11; 15; 16; 17; 22; 44; 37; 16; 14; 24; 25; 15; 26; 27; 33; 29; 35; 44; 13; 21; 22; 10; 12; 8; 40; 32; 26; 27; 31; 34; 29; 17; 8; 24; 18; 47; 33; 34

Researcher B: 3; 14; 11; 5; 16; 17; 28; 41; 31; 18; 14; 14; 26; 25; 21; 22; 31; 2; 35; 44; 23; 21; 21; 16; 12; 18; 41; 22; 16; 25; 33; 34; 29; 13; 18; 24; 23; 42; 33; 29

Complete the tables using the data provided:

Researcher a
Survival Length (in months) Frequency Relative Frequency Cumulative Relative Frequency
0.5–6.5
6.5–12.5
12.5–18.5
18.5–24.5
24.5–30.5
30.5–36.5
36.5–42.5
42.5–48.5
Researcher b
Survival Length (in months) Frequency Relative Frequency Cumulative Relative Frequency
0.5–6.5
6.5–12.5
12.5–18.5
18.5–24.5
24.5–30.5
30.5–36.5
36.5-45.5
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Determine what the key term data refers to in the above example for Researcher A.

values for X , such as 3, 4, 11, and so on

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Source:  OpenStax, Introductory statistics. OpenStax CNX. May 06, 2016 Download for free at http://legacy.cnx.org/content/col11562/1.18
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