Assignment 2:Conducting A Z-Test.

Assignment 2:Conducting A Z-Test.

Assignment 2:Conducting A Z-Test.

A researcher predicts that watching a film on institutionalization will change students attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students, shows them the fulm, and gives them a questionnaire about their attitudes. The main score on the questionnaire for these 36 students is 70. The score for a similar class of students who did not see the film is 75. The standard deviation is 12. Using the five steps of hypothesis testing and the 5% significance level ( i.e. alpha= .05). does showing the film change students attitudes towards the chronically mentally ill?

1. What does it mean to set apha at .05?

2. What is your null hypothesis? Alternate hypothesis?

3. Is this a one- tailed or two-tailed hypothesis?

4. What is the critical z?

5. Suppose the obtained z was -2.5. Do you reject or fail to reject the null hypothesis?

6. State in words what you have found.

Grading criteria

explained what it means to set alpha at .02

correctly identified the null and alternatice hypotheses.


correctly identfified and explained whether theirs is a one – tailed or two – tailed hypothesis.

explained, whether one would reject or fail to reject the null hypothesis, and stte in words what the findings were.

wrote in a clear, concise, and orgainized manner, demonstrated ethical scholarship in accurate representation adn attribution of sources, displayed accurate spelling, grammer, and punctuation.

You must proofread your paper. But do not strictly rely on your computer’s spell-checker and grammar-checker; failure to do so indicates a lack of effort on your part and you can expect your grade to suffer accordingly. Papers with numerous misspelled words and grammatical mistakes will be penalized. Read over your paper – in silence and then aloud – before handing it in and make corrections as necessary. Often it is advantageous to have a friend proofread your paper for obvious errors. Handwritten corrections are preferable to uncorrected mistakes.

Use a standard 10 to 12 point (10 to 12 characters per inch) typeface. Smaller or compressed type and papers with small margins or single-spacing are hard to read. It is better to let your essay run over the recommended number of pages than to try to compress it into fewer pages.

Likewise, large type, large margins, large indentations, triple-spacing, increased leading (space between lines), increased kerning (space between letters), and any other such attempts at “padding” to increase the length of a paper are unacceptable, wasteful of trees, and will not fool your professor.

The paper must be neatly formatted, double-spaced with a one-inch margin on the top, bottom, and sides of each page. When submitting hard copy, be sure to use white paper and print out using dark ink. If it is hard to read your essay, it will also be hard to follow your argument.