Question

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

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

All the people in the world

All males

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

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.

Random

Normal

Independent

Systematic

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

Inferential statistics

Correlational statistics

Descriptive statistics

Test statistics

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

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?

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

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

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

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

Distance from the airport

Stress

Location

11. In the preceding question the independent variable is

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

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

Knocking on doors and interview whoever answers

Taking every 10th name out of the telephone book

13. The Greek letter ∑ is a symbol for

Suppression

The square root

Multiplication

Summation

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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.

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