A researcher is interested in the effect that headwear has on perception of whet

Question

A researcher is interested in the effect that headwear has on perception of whether a person is a security risk at the airport. She takes pictures of a 35-year-old male with no hat, with a knit cap pulled low on his forhead, and with a cowboy hat. Security workers (n=36) from the airport are randomly assigned to view one of the pictures and asked to rate how much of a security risk they would consider the person in the picture. Ratings vary from 1 = no risk to 10 = high risk. Assume a two-tailed test with significance set at .05.

a) What is the null hypothesis?

b) What is the alternative hypothesis?

c) List the independent variable and the levels of the IV

d) List the dependent variable

e) List the scale of measurement for the DV (interval, nominal, ratio, etc.)

f) Reject or retain null hypothesis?

No hat 5 4 3 3 6 5 3 2 6 7 5 3 Knit cap 8 7 5 7 4 6 6 9 8 7 10 8 Cowboy hat 3 6 7 7 5 4 9 5 2 6 3 5

Explanation / Answer

a) An individual's headwear has no significant impact on the perception of their security risk at the airport.

b) An individual's headwear has a significant impact on the perception of their security risk at the airport.

c) The IV: Headwear. There are three levels: No hat, Knit cap, Cowboy hat.

d) The DV: Perception of security risk at the airport.

Please post the other questions separately as we are supposed to answer just one question or four parts of a single question.

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