Twenty Students Are Given an Attitude Test Before and After

question 31

Essay

Twenty students are given an attitude test before and after viewing a motion picture designed to change their attitudes favorably toward a new curriculum. A high score indicates a favorable attitude and a low score indicates an unfavorable attitude, with the scores ranging from 1 to 30. This problem will use the sign test on the data given below to see if we can conclude the motion picture was successful in improving attitudes. Describe what the test statistic is for the sign test.
________________________________________________________
What is the value of the test statistic in this problem?
______________
Is this a one-tailed test or a two-tailed test?
______________
Find the rejection region for = 0.10.
Reject when T > ______________
Using as above, can we conclude the motion picture was successful in changing attitudes?
______________
Conclusion: The motion picture was ______________ in changing attitudes.
At what level of significance could we reject H₀?
______________

---

Definitions:

Annual Dividend

The total dividend payments made to shareholders in a year, typically expressed per share.

Rate of Return

The enhancement or reduction in worth of an investment across a specific duration, measured as a proportion of the investment's original cost.

First Dividends

The initial distribution of earnings paid to shareholders by a corporation that has just begun paying dividends.