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Experimental Design AP Statistics

Authored by Anthony Clark

Mathematics

12th Grade

Used 9+ times

Experimental Design AP Statistics
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16 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In the previous problem, supposed that the researchers suspected that women over the age of 55 may respond differently to the treatment. Given that a random sample of 40,000 women over the age of 45 has already been chosen, the study would have been improved by:

a stratified sample, with strata determined by age.

a stratified sample, with strata determined by gender.

a block design, with blocks determined by age.

a block design, with blocks determined by gender.

a double-blind completely randomized design.

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Left-handedness is the preference for the left hand over the right for everyday activities such as writing. Studies indicate that about 93% of the population may be characterized as right-handed. Researchers would like to conduct a study to determine if left-handed teens differ significantly in their ability to memorize facts than right-handed teens. Suppose the researchers concluded that the average number of words memorized by left-handed teens was statistically significantly higher than the average number memorized by right-handed teens. In this context, statistically significant means that:

the number of words memorized by left-handed students exceeded the number memorized by right-handed students.

the average number of words memorized by left-handed students exceeded the average number memorized by right-handed students.

right-handed students tend to not do as well as left-handed students in memorizing words.

it would be unlikely to observe an average difference as large as was observed by chance variation.

a randomized, controlled experiment was conducted.

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

What kind of experiment is shown in the picture?

Randomized Block Design

Completely Randomized Design

Matched Pairs

SRS

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A market research company wishes to find out whether the population of students at a university prefers Starbucks or Dunkin Donuts. A random sample of students is selected, and each student is asked first to try both but the order they try them is randomly decided with a coin toss (heads: Starbucks, then Dunkin. tails: vice versa). They then indicate which brand they prefer. This is an example of

completely randomized experiment

observational study

stratified sample

matched pairs experiment

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is a key distinction between well designed experiments and observational studies?

More subjects are available for experiments than for observational studies.

Ethical constraints prevent large-scale observational studies.

Experiments are less costly to conduct than observational studies.

An experiment can show a direct cause-and-effect relationship, whereas an observational study cannot.

Tests of significance cannot be used on data collected from an observational study.

6.

MULTIPLE CHOICE QUESTION

1 min • 10 pts

Does listening to classical music while studying increase test scores?

Survey

Observational study

Experimental study

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What type of study is described? A gym tries out a new weightlifting method to see if it will build muscle for their customers faster than their current method.

Sample Survey

Experiment

Observational Study

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