Solution-Test whether the increase was statiscally

Test whether the increase was statiscally significant

Assignment Help Mathematics

Reference no: EM131008368

1) Given 2 samples:

n₁ = 39 x₁^- = 10 s₁= 1.4

n₂ = 36 x₂^- = 9 s₂ = 1.25

a) Test if μ₁ = μ₂ with a one-tail at α = .05.

b) Do a 90% confidence interval.

2) Given 2 samples:

n₁ = 28 x₁^- = 50.1 s₁= 3.9

n₂ = 25 x₂^- = 53.5 s₂ = 3.0

a) Test if μ₁ = μ₂ with a one-tail at α = .05.

b) Do a 90% confidence interval.

3) A device was installed to improve the gas mileage of vehicles in a small taxi fleet. Test whether the increase was statiscally significant with a two-tail test at α = .05.

Vehicle	Before	After
Car 47	15	16
Car 37	14	15
Car 22	13	15
Car 02	13	16
Car 10	12	13
Car 666	14	15

Reference no: EM131008368

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Test whether the increase was statiscally significant

Reference no: EM131008368

Reference no: EM131008368

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