The size of the p-value depends

on - - - - -

Which of the options below is a valid description of a 'construct' in

psychological research?  It is a

A psychologist uses a

psychometric test to study the intelligence of school children. Intelligence is

the - - - - - variable and the psychometric test represents the - - - - - variable

in this study.

The lower we set the level of significance, the greater the probability

of - - - - -.

The z score corresponding to a

raw score represents the number of - - - - - that the raw score differs from

the mean of the raw score distribution.

An

industrial psychologist wants to investigate the levels of assertiveness among

different categories of workers in a large company. He draws a sample of 200

workers and then divides them into managers, clerical workers, technical

workers and manual workers with the intention of getting each participant to do

a test to determine their level of assertiveness. The division of workers into

these four groups represents a measurement on a

 If a coin is flipped three times, the sample space of possible outcomes is:

Lebo claims that workers in large companies are less work

motivated than workers in small companies. In a previous study involving all

large companies in South Africa, it was found that the average workers’

motivation score on a work motivation questionnaire (where a higher score

indicates a higher level of work motivation) was 50 with a standard deviation

of 15. Lebo plans to present the same questionnaire to a sample of workers from

small companies to determine whether her suspicion is true.

If Lebo tests this

hypothesis against a significance level of α=0.01, what can she conclude about

the motivation level of small companies?

Lebo, a research psychologist, suspects that the addition of

certain food supplements to the diet of elderly people will reduce the decline

in cognitive functioning that comes about because of aging. She decides to test

this using a neuropsychological test that measure perceptual speed (the NPS

test). It is known that the distribution of scores on this test is

approximately normal and that a mean of µ=50 and a standard deviation of σ=15

was found in the population of persons older than 65.

To investigate her hypothesis, Lebo obtains a random sample

of n=100 persons older than 65. Each member of this sample is given a daily

dose of supplements over a period of six months. At the end of this time, each

person is tested on the NPS test and a mean of x¯ = 58.4 and standard deviation

of s = 16.8 is found. She plans to test the hypothesis at α = 0.05.

A

psychologist studies the effect that age has on attitude towards Aids.  She selects a sample of subjects divided into

three different age groups, 20‑30 years, 30‑40 years and 40‑50 years. The three

age groups are - - - - -.