1. Dr. Pagels is a mammalogist who studies meadow and common voles. He frequentl
ID: 3225004 • Letter: 1
Question
1. Dr. Pagels is a mammalogist who studies meadow and common voles. He frequently traps the moles and has noticed what appears to be a preference for a peanut butter-oatmeal mixture by the meadow voles vs apple slices are usually used in traps, where the common voles seem to prefer the apple slices. So he conducted a study where he used a peanut butter-oatmeal mixture in half the traps and the normal apple slices in his remaining traps to see if there was a food preference between the two different voles.
His null hypothesis is: (a)There is a positive correlation between voles and food preference.
(b)There is no difference between voles and food preferences.
(c)There is a relationship between voles and food preference.
(d)There is no difference between meadow and common voles.
His alternate hypothesis is: (a)There is a positive correlation between voles and food preference.
(b)There is no difference between voles and food preferences.
(c)There is a relationship between voles and food preference.
(d)There is no difference between meadow and common voles.
2. When comparing two means if the difference between the means is __(small,large,unchanged)__ and the variance within the samples is small then the t value will be _____(small,large,unchanged)____.
3.
In order to test if the mean from Population A is greater than the mean from Population B what kind of t-test would you use?
(a)two-tailed t-test (b)paired t-test (c)one tailed t test (d)unpaired t test (e)one sample t test
Explanation / Answer
1) null hypothesis is: (d)There is no difference between meadow and common voles.
2) When comparing two means if the difference between the means is small and the variance within
the samples is small then the t value will be small
3) to test if the mean from Population A is greater than the mean from Population B
(c)one tailed t test would you use
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