Nutritional supplementation with dr petit oiseau

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Reference no: EM132469626

A statistician measures the difference in songbird warble variation in 25 mockingbirds, both before and after nutritional supplementation with Dr. Petit Oiseau's Musical Bird Seed. Warble variation is determined by a computer program that detects sound frequency and pattern changes during a 15-minute period twice a day, and these data are averaged to represent number of warble variations per minute. What considerations determine choice of a test for this research? Select all that apply.

a The sample size is small to moderate.

b There is one group of birds and all receive the treatment.

c A before-after type of design is used.

d The independent variable is at the nominal level.

e The dependent variable is at the ordinal level.

Reference no: EM132469626

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