stats 1

1.

1 point

To reduce variability, use

A larger sample

Random sampling

2.

1 point

Which of the following is NOT one of the three first principles of data ethics

Informed consent

confidentiality

anonymity

institutional review board

3.

1 point

What type of study tries to gather information without disturbing the scene their observing?

Interactive study

Experiment

Observational study

passive study

4.

1 point

A good sampling method has both __ and __

Large bias; large variability

large bias; small variability

small bias; large variability

Small bias; small variability

5.

1 point

A _ is a var tht measures outcome or result of a study A _ is a var that causes change in the _

Explanatory var.; response var.; explanatory var.

response var.; explanatory var.; treatment

response var.; explanatory var.; response var.

response var.; lurking var.; response var.

6.

1 point

Check all that apply: a confidence statement consists of

A margin of error

a level of confidence

a sample variance

a standard deviation

Both a and c

Both a and b

7.

1 point

A _ of size n has n ppl from the pop. chosen that every set of n ppl has = chance 2 be selected

Voluntary response sample

convenience sample

Stratified random sample

Simple random sample

8.

1 point

Check all that are true

Observational studies are a special type of sample survey

sample surveys are a special type of observational study

a sample survey chooses a pop. from a specific sample

A sample is a subset of a population

Both b and c

both a and c

9.

1 point

Clinical trials are

Medical experiments involving human subjects

Observational studies involving human subjects

a formal explanation of evidence before a judge and jury

experiments over an entire population

10.

1 point

To reduce bias, use

A larger sample

Random sampling

11.

1 point

Which of the following is true about control groups?

Control groups always receive placebos

There can only be one group per experiment

Control groups allow us control effects of lurking variables

Control groups tend to boss other groups around

12.

1 point

Subjects who participate but don't follow the experimental treatment are called

passive-aggressive

nonadherers

droupouts

trolls

13.

1 point

Check each of the following that are true

Statistical studies record data about individuals

variables can take nonnumerical values

individuals describe variables

both a and b