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Chapter 1: Q. 38 (page 52)

Is it possible for two experiments to be well run with similar sample sizes to get different data?

Short Answer

Expert verified

Yes, it is feasible for two well-run studies with similar sample sizes to provide different results.

Step by step solution

01

Introduction

Independent groups denote that the two samples obtained are unrelated in any sense, i.e., sample values from one population are unrelated to sample values from the other population.

02

Explanation

Whentwostudieswithcomparablesamplesizesaredone,thetechniquesforpickingthetwosamplesmaydiffer,andthefinalsamplemaybesignificantlydifferent.
Thismayresultindifferentdatabeingobtained.
The first sample, for example, was selecting in a classroom, whereas the second sample was selecting at a football stadium.
Both samples would clearly be different, and so the data obtained would be different as well, despite the fact that the sample size would be the same.

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Most popular questions from this chapter

Is a sample size of two representative of a population of five?

Fifty part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below:

a. Fill in the blanks in Table 1.33.

b. What percent of students take exactly two courses?

c. What percent of students take one or two courses?

Sixty adults with gum disease were asked the number of times per week they used to floss before their diagnosis. The (incomplete) results are shown in Table 1.34.

a. Fill in the blanks in Table1.34.

b. What percent of adults flossed six times per week?

c. What percent flossed at most three times per week?

Design an experiment. Identify the explanatory and response variables. Describe the population being studied and the experimental units. Explain the treatments that will be used and how they will be assigned to the experimental units. Describe how blinding and placebos may be used to counter the power of suggestion.

An advertisement for Acme Investments displays the two graphs in Figure 1.14to show the value of Acme鈥檚 product in comparison with the Other Guy鈥檚 product. Describe the potentially misleading visual effect of these comparison graphs. How can this be corrected?
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