Section Exercise 10-2 Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel. (a-1) Comparison of GPA for randomly chosen college juniors and seniors: x⎯⎯1x¯1 = 4.75, s1 = .20, n1 = 15, x⎯⎯2x¯2 = 5.18, s2 = .30, n2 = 15, α = .025, left-tailed test. (Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick" rules for degrees of freedom.) d.f. t-calculated p-value t-critical (a-2) Based on the above data choose the correct decision. multiple choice 1 Do not reject the null hypothesis Reject the null hypothesis (b-1) Comparison of average commute miles for randomly chosen students at two community colleges: x⎯⎯1x¯1 = 25, s1 = 5, n1 = 22, x⎯⎯2x¯2 = 33, s2 = 7, n2 = 19, α = .05, two-tailed test. (Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick" rules for degrees of freedom.) d.f. t-calculated p-value t-critical +/- (b-2) Based on the above data choose the correct decision. multiple choice 2 Do not reject the null hypothesis Reject the null hypothesis (c-1) Comparison of credits at time of graduation for randomly chosen accounting and economics students: x⎯⎯1x¯1 = 150, s1 = 2.8, n1 = 12, x⎯⎯2x¯2 = 143, s2 = 2.7, n2 = 17, α = .05, right-tailed test. (Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick" rules for degrees of freedom.) d.f. t-calculated p-value t-critical (c-2) Based on the above data choose the correct decision. multiple choice 3 Do not reject the null hypothesis Reject the null hypothesis

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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Section Exercise 10-2

Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel.

(a-1) Comparison of GPA for randomly chosen college juniors and seniors:

x⎯⎯1x¯1 = 4.75, s₁ = .20, n₁ = 15, x⎯⎯2x¯2 = 5.18, s₂ = .30, n₂ = 15, α = .025, left-tailed test.
(Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick" rules for degrees of freedom.)


d.f.
t-calculated
p-value
t-critical

(a-2) Based on the above data choose the correct decision.

multiple choice 1

Do not reject the null hypothesis
Reject the null hypothesis

(b-1) Comparison of average commute miles for randomly chosen students at two community colleges:

x⎯⎯1x¯1 = 25, s₁ = 5, n₁ = 22, x⎯⎯2x¯2 = 33, s₂ = 7, n₂ = 19, α = .05, two-tailed test.
(Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick" rules for degrees of freedom.)


d.f.
t-calculated
p-value
t-critical	+/-

(b-2) Based on the above data choose the correct decision.

multiple choice 2

Do not reject the null hypothesis
Reject the null hypothesis

(c-1) Comparison of credits at time of graduation for randomly chosen accounting and economics students:

x⎯⎯1x¯1 = 150, s₁ = 2.8, n₁ = 12, x⎯⎯2x¯2 = 143, s₂ = 2.7, n₂ = 17, α = .05, right-tailed test.
(Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick" rules for degrees of freedom.)


d.f.
t-calculated
p-value
t-critical

(c-2) Based on the above data choose the correct decision.

multiple choice 3

Do not reject the null hypothesis
Reject the null hypothesis

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