Subpart g h i 5. A reason people give for drinking coffee is "alertness" or "energy". This could be thecase for kids who drink coffee. Or they could be groggier from a lack of sleep due tocoffee. We asked ni=50 17-year-old kids who drink coffee if they "felt alert" x1=30answered yes, we then asked n2-50 kids who don't drink coffee and x2-20 of the kidsanswered that they the "felt alert". We would like to compare these two proportions.a. What are the estimated proportions?b. What are the null and alternative hypothesis?c. Perform the test, what do you conclude?Another way we could look at this would be to do a test of association on the 2x2 tableconstructed from this data (see Chapters 17 Section 3 pages 573-579:).d. Please construct the tablee. What is the new null and alternative hypothesis?f. What are the expected counts (under the null hypothesis)g. What are the observed minus expected counts?h. What is the test statistic? How many degree of freedom?i. What is the critical value? What do you conclude?

Given: Alertness Yes No Total Drinks coffee 30 20 50 Does not drink coffee 20 30…

Answered: g. What are the observed minus expected…

g. What are the observed minus expected counts? h. What is the test statistic? How many degree of freedom? i. What is the critical value? What do you conclude?

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

Transformation of Graphs

The word ‘transformation’ means modification. Transformation of the graph of a function is a process by which we modify or change the original graph and make a new graph.

Exponential Functions

The exponential function is a type of mathematical function which is used in real-world contexts. It helps to find out the exponential decay model or exponential growth model, in mathematical models. In this topic, we will understand descriptive rules, concepts, structures, graphs, interpreter series, work formulas, and examples of functions involving exponents.

Question

Subpart g h i

5. A reason people give for drinking coffee is "alertness" or "energy". This could be the
case for kids who drink coffee. Or they could be groggier from a lack of sleep due to
coffee. We asked ni=50 17-year-old kids who drink coffee if they "felt alert" x1=30
answered yes, we then asked n2-50 kids who don't drink coffee and x2-20 of the kids
answered that they the "felt alert". We would like to compare these two proportions.
a. What are the estimated proportions?
b. What are the null and alternative hypothesis?
c. Perform the test, what do you conclude?
Another way we could look at this would be to do a test of association on the 2x2 table
constructed from this data (see Chapters 17 Section 3 pages 573-579:).
d. Please construct the table
e. What is the new null and alternative hypothesis?
f. What are the expected counts (under the null hypothesis)
g. What are the observed minus expected counts?
h. What is the test statistic? How many degree of freedom?
i. What is the critical value? What do you conclude?

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