A survey of the white and nonwhite population in a local area reveals the following annual trip frequencies to the nearest state park: X̄1 = 4.1 X̄2= 3.1 s21 = 14.3 s22= 12.0 N1= 20 N2= 16 Where the subscript '1' denotes the white population and the dubscript '2' denotes the nonwhite population. Please solve (d) and (e) as a-c have been solved in the previous question. (a) assume the variances are equal, and test the null hypothesis that there is no difference between the park-going frequences of whites and nonwhites (b) repeat the exercise, assuming that the variances are unequal (c) Find the p-value associated with the tests in parts (a) and (b) (d) Associated with the test in part (a), find a 95% confidence interval for the difference in means (e) repeat parts a-d, assuming sample sizes of n1= 24 and n2= 12
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A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
A survey of the white and nonwhite population in a local area reveals the following annual trip frequencies to the nearest state park:
X̄1 = 4.1
X̄2= 3.1
s21 = 14.3
s22= 12.0
N1= 20
N2= 16
Where the subscript '1' denotes the white population and the dubscript '2' denotes the nonwhite population. Please solve (d) and (e) as a-c have been solved in the previous question.
(a) assume the variances are equal, and test the null hypothesis that there is no difference between the park-going frequences of whites and nonwhites
(b) repeat the exercise, assuming that the variances are unequal
(c) Find the p-value associated with the tests in parts (a) and (b)
(d) Associated with the test in part (a), find a 95% confidence interval for the difference in means
(e) repeat parts a-d, assuming sample sizes of n1= 24 and n2= 12
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