A Study Was Conducted to Investigate the Effect of an Intervention

question 55

Multiple Choice

A study was conducted to investigate the effect of an intervention protocol on IQ tests.Nine randomly selected students were tested. Set up the alternative hypothesis for the claim that the intervention protocol is effective in increasing scores.

• A)H₀: The probability distribution of test scores before and after the intervention protocol is identical.
• B)H₀: The probability distribution of test scores before the protocol has shifted to the left of the probability distribution of the test scores after the protocol.
• C)H₀: The probability distribution of test scores before the protocol has shifted to the right of the probability distribution of the test scores after the protocol.
• D)H₀: The probability distribution of test scores before the protocol has shifted to the left or right of the probability distribution of the test scores after the protocol.

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Definitions:

Basic Research

Fundamental scientific investigation aimed at gaining more comprehensive knowledge or understanding of the subject under study, without immediate practical application in mind.

Public Sector

The sector of an economy that is controlled by the government and includes government services and enterprises.

Free-Rider Problem

A situation in public goods where individuals benefit without contributing due to non-excludability.

Private Charity

Voluntary giving by individuals or organizations to those in need, without government intervention or assistance.