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Chapter 1: Q.31 (page 52)

Both groups that performed the study concluded that the software works. Is this accurate?

Short Answer

Expert verified

No, it is not accurate both investigations do not come to the same conclusion that the programs works.

Step by step solution

01

Introduction

The software programs appears to be effective, as seen by the second trial, which found that patients who used the software improved more than those who did not. Even though the difference is not as large as in the first trial, the second study's results are more likely to be trustworthy and reflect improvement.

02

Explanation

The numbers appear to be significantly different in the first research, indicating that the program may be useful. The differences in the figures in the second research appear to be normal or minimal, which may not show the software's efficiency. As a result, the two studies with separate sets of numbers mentioned in the question is not accurate.

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Most popular questions from this chapter

Table 1.26 contains the total number of deaths worldwide as a result of earthquakes from 2000 to 2012.

Use Table 1.26 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.

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 they start the treatment. Two researchers each follow a different set of 40 patients with AIDS 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

Determine what the key terms refer to in the example for Researcher A.

variable

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A cardiologist is interested in the mean recovery period of her patients who have had heart attacks.

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