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7. A survey of the white and nonwhite population in a local area reveals the following annual trip frequencies to the nearest state park x₁ = 4.1,

7. A survey of the white and nonwhite population in a local area reveals the following annual trip frequencies to the nearest state park x₁ = 4.1,

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Qn 7 part b, c, d, e. NO EXCEL.
of z=1.645 (based on a null hypothesis that the ds. The p-value is found ormal table; the resulting or a community to within an e level. A small survey is 2.0. How large should tion of commuters who be, if the planner desires a esearcher takes a sample of ant is 18.5 mg/l, with a nce interval around the vel is within this interval ion of childless couples in a erage of 0.12. The analyst es in her community is higher s interviewed; the mean to be 0.16. Test the null a. 7. A survey of the white and nonwhite population in a local area reveals the following annual trip frequencies to the nearest state park ₁ = 4.1, ₂3.1, = 14.3. 12.0, b. K 4 = 20 y = 16 where the subscript '1' denotes the white population and the subscript 2 denotes the nonwhite population. + Repeat the exercise, assuming that the variances are unequal Find the p-value associated with the tests in parts (a) and (b) C. d Associated with the test in partha), find a 95% confidence interval for the difference in means. G Assume that the variances are equal, and test the null hypothesis that there is no difference between the park-going frequencies of whites and nomwhites e., Repeat parts (a)-(d), assuming sample sizes of n, -24 and m,- 12 8. Test the hypothesis that two communities have equal support for a political candidate using the following data: Community A: P₁ -0.33 n₁-54 Community B: P = 0.18 n=38 9. A researcher suspects that the level of a particular stream's pollutant is higher than the allowable limit of 4.2 mg/l. A sample of n - 17 reveals a mean polutant level of x-6.4 mg/l, with a standard deviation of 4.4 mgl is there sufficient evidence that the stream's pollutant level exceeds the allowable limit? What is the P-value? Q
Transcribed Image Text:of z=1.645 (based on a null hypothesis that the ds. The p-value is found ormal table; the resulting or a community to within an e level. A small survey is 2.0. How large should tion of commuters who be, if the planner desires a esearcher takes a sample of ant is 18.5 mg/l, with a nce interval around the vel is within this interval ion of childless couples in a erage of 0.12. The analyst es in her community is higher s interviewed; the mean to be 0.16. Test the null a. 7. A survey of the white and nonwhite population in a local area reveals the following annual trip frequencies to the nearest state park ₁ = 4.1, ₂3.1, = 14.3. 12.0, b. K 4 = 20 y = 16 where the subscript '1' denotes the white population and the subscript 2 denotes the nonwhite population. + Repeat the exercise, assuming that the variances are unequal Find the p-value associated with the tests in parts (a) and (b) C. d Associated with the test in partha), find a 95% confidence interval for the difference in means. G Assume that the variances are equal, and test the null hypothesis that there is no difference between the park-going frequencies of whites and nomwhites e., Repeat parts (a)-(d), assuming sample sizes of n, -24 and m,- 12 8. Test the hypothesis that two communities have equal support for a political candidate using the following data: Community A: P₁ -0.33 n₁-54 Community B: P = 0.18 n=38 9. A researcher suspects that the level of a particular stream's pollutant is higher than the allowable limit of 4.2 mg/l. A sample of n - 17 reveals a mean polutant level of x-6.4 mg/l, with a standard deviation of 4.4 mgl is there sufficient evidence that the stream's pollutant level exceeds the allowable limit? What is the P-value? Q
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