What is the optimal time for a scuba diver to be on the bottom of the ocean? That depends on the depth of the dive. The U.S. Navy has done a lot of research on this topic. The Navy defines the "optimal time" to be the time at each depth for the best balance between length of work period and decompression time after surfacing. Let x = depth of dive in meters, and let y = optimal time in hours. A random sample of divers gave the following data. 23.3 2.18 29.2 1.88 51.3 0.75 16.1 38.3 20.5 22.7 у 2.68 1.03 2.38 2.20 (a) Find Σχ , Σy, Σ?, Σγ?, Σχy, and . (Round r to three decimal places.) Ex = Ey = Ex² = Ey² = Exy = (b) Use a 1% level of significance to test the claim that p < 0. (Round your answers to two decimal places.) critical t =

What is the optimal time for a scuba diver to be on the bottom of the ocean? That depends on the depth of the dive. The U.S. Navy has done a lot of research on this topic. The Navy defines the "optimal time" to be the time at each depth for the best balance between length of work period and decompression time after surfacing. Let x = depth of dive in meters, and let y = optimal time in hours. A random sample of divers gave the following data. 23.3 2.18 29.2 1.88 51.3 0.75 16.1 38.3 20.5 22.7 у 2.68 1.03 2.38 2.20 (a) Find Σχ , Σy, Σ?, Σγ?, Σχy, and . (Round r to three decimal places.) Ex = Ey = Ex² = Ey² = Exy = (b) Use a 1% level of significance to test the claim that p < 0. (Round your answers to two decimal places.) critical t =

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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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Concept explainers

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

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Question

What is the optimal time for a scuba diver to be on the bottom of the ocean? That depends on the depth of the dive. The U.S. Navy has done a lot of research on this topic. The Navy defines the
"optimal time" to be the time at each depth for the best balance between length of work period and decompression time after surfacing. Let x =
depth of dive in meters, and let y = optimal time in
hours. A random sample of divers gave the following data.
16.1
23.3
29.2
38.3
51.3
20.5
22.7
2.68
2.18
1.88
1.03
0.75
2.38
2.20
(a) Find Ex, Ey, Ex², Ey², Exy, and r. (Round r to three decimal places.)
Σχ-
Ey =
Ex² =
Ey? =
Ey2:
Σχy
r =
(b) Use a 1% level of significance to test the claim that p < 0. (Round your answers to two decimal places.)
t =
critical t =

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