Question

1. If you want to study the effect of hormonal changes in adolescent boys, your population would be

Group of answer choices

All adolescents

All the people in the world

All males

All adolescent males

2. Which of the following is most likely to be measured categorically?

Group of answer choices

Weight gain in first year college students

Deterioration in driving performance under the influence of alcohol

Level of authoritarianism in a sample of public accountants

Species of dog appearing in the Sunday comics

3. To produce good estimates of population parameters we need to have a _______ sample.

Group of answer choices

Random

Normal

Independent

Systematic

4. The branch of statistics dealing with making comparisons between two different conditions in which subjects were tested is called

Group of answer choices

Inferential statistics

Correlational statistics

Descriptive statistics

Test statistics

5. One of the most important skills that students learn in statistics courses is

Group of answer choices

The ability to memorize complex mathematical formulae

the ability to logically interpret data

Nothing important is learned in statistics courses

The ability to perform multiple regressions on a calculator

6. Which of the following is false?

Group of answer choices

We usually collect data from an entire population

A sample refers to the observations drawn from a population

The average score on an example for a class is a descriptive statistic

Categorical data is also known as frequency data

7.Without a random sample, we cannot

Group of answer choices

Collect quantitative data

Accurately estimate the parameters of a population

Calculate statistics

Consult a decision tree to decide on an appropriate statistical procedure

8. Scales of measurement are important because

Group of answer choices

They reflect the kinds of statements we may make about relationships between points on the scale

They limit the kinds of conclusions we can draw from a study

They influence the kinds of statistical tests we will use in at least a crude way

All options present

9. When we are concerned about the measurement scale, we are concerned about

Group of answer choices

Both the underlying concept and our interpretation of them

The underlying concept which we are trying to measure

The interpretation we can give to our resulting statistics

The numbers we have collected

10. If we are comparing the adrenaline scores of children who live near an airport with those who live away from an airport, the dependent variable is

Group of answer choices

Distance from the airport

Stress

Adrenaline

Location

11. In the preceding question the independent variable is

Group of answer choices

Adrenaline

Stress

The number of children treated for sleep disturbance

Location

12. If we want to obtain a random sample of people to interview, we could best do so by

Group of answer choices

Drawing random numbers from a table and linking a number to a person

Knocking on doors and interview whoever answers

Asking for volunteers

Taking every 10th name out of the telephone book

13. The Greek letter ∑ is a symbol for

Group of answer choices

Suppression

The square root

Multiplication

Summation

Answer 1

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As per forum rules we are allowed to answer 1 question per post, hence answering the first question. You may post other questions separately.

1.

The study group is all boy adolescents ( hence male adolescents only are part of the study in the question, not the entire universe).

Hence, the population under study will be : All adolescents males.

Other groups, such as All Males, or All the people in the world , or All adolsecents ARE NOT the scope of the study.

Answer: All adolescent Males