A researcher is interested in evaluating the association between age and the proportion of subjects consumingdifferent brands of soft drinks. Consider the table below, formed by cross-classifying age groups and brands.DATA:Cola 1Cola 2Cola 3Under Age 15Questions:170216328Age 15-25124145232Age 25-35228232336The researcher wants to evaluate the following hypothesis:Ho: There is no association between the two factors (i.e. there is no difference in the proportion of peopleconsuming different brands of soft drinks).AgainstHA: There is an association between the two factors.The calculated "x²" statistics for this particular data set was found to be: 5.621. What is the critical value of "x²" using an alpha = 0.1 (round to the nearest tenth) Blank 12. Given the "x²" calculated and the critical value of "x2" indicate if you are going to reject or fail to rejectthe null hypothesis using an alpha = 0.1 Blank 2

1. It is needed to check the association between age and the proportion of subjects consuming…

Answered: A researcher is interested in…

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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How young is too young to have a cell phone? A group of eighth-grade boys and girls were surveyed and asked if they had a cell phone, with the following results. Cell Phone No Cell Phone Boys 54 46 Girls 57 43 (a) Draw a stacked bar chart to describe the data. I Cell Phone I No Cell Phone 1 Cell Phone I No Cell Phone 1 Cell Phone I No Cell Phone Frequency Frequency Frequency 100 100 100 80 80 80 60 60 60 40 40 40 20 20 20 Gender- Gender- Gender Boys Girls Вoys Girls Воys Girls Cell Phone No Cell Phone Frequency 100 80 60 40 20
The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.
A. For which data set is the sample correlation coefficient r closest to −1? B. For which data set is the sample correlation coefficient r closest to 0? C. For which data set is the sample correlation coefficient r equal to 1?
his question refers to excavations at a national monument. One question the archaeologists asked was: Is raw material used by prehistoric Indians for stone tool manufacture independent of the archaeological excavation site? Two different excavation sites gave the information in the following table. Use a chi-square test with 5% level of significance to test the claim that raw material used for construction of stone tools and excavation site are independent. Excavation Site Material Site A Site B Row Total Basalt 756 559 1315 Obsidian 92 103 195 Pedernal chert 514 521 1035 Other 88 91 179 Column Total 1450 1274 2724 (a) What is the level of significance? (b) Find the value of the chi-square statistic for the sample. (Round the expected frequencies to at least three decimal places. Round the test statistic to three decimal places.)
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