How to test for differences in population proportions

Assignment Help Applied Statistics

Reference no: EM132376562

Problem -

In STATS 250 you learned how to test for differences in population proportions. To do so in R we use the command prop.test ( ). For example, if I flip one coin 30 times and see 20 heads, and a second coin 12 times and see 3 heads, then

In [7]: prop.test(x = c(20, 3), n = c(30, 12))

2-sample test for equality of proportions with continuity correction

data: c(20, 3) out of c(30, 12)

X-squared = 4.4427, df = 1, p-value = 0.03505

alternative hypothesis: two.sided

95 percent confidence interval:

0.06088074 0.77245259

sample estimates:

prop 1 prop 2

0.6666667 0.2500000

tells me that there is a significant difference in the success probabilities of the two coins at the 5% level, though not at the 1% level (p-value 0.035).

From the preceding exercise, it seems like the fraction of babies with names ending in o grew substantially in the 21st century. Check this by testing whether the proportion of such babies born between 1980 and 1999 (inclusive) is different from the proportion from the year 2000 onwards. (Hint: there were 1,594,457 born in 2000 or later whose name ends in o.)

Interpret your result. What is driving this change? How do these data support that conclusion?

Note - Attached is the same document in R if it is helpful.

Attachment:- R Programming Assignment Files.rar

Reference no: EM132376562

Questions Cloud

Provide specific evidence of particular crime in most case : Since information extracted from router or switch interfaces to not provide specific evidence of a particular crime in most cases,

How your chief nurse executive demonstrates expertise : Select one of the sections and share how your chief nurse executive demonstrates expertise in these competencies. Your comments should be about.

Efficient frontier analysis in strategic risk management : Uses of Efficient Frontier Analysis in Strategic Risk Management- A Technical Examination. Efficient Frontier Analysis to evaluate risks of portfolio presented.

Which theory or approach have you used : Think about the ethical theories and approaches in Chapter 4 and the moral conflicts you have experienced in the past. Have you used one of these approaches.

How to test for differences in population proportions : In STATS 250 you learned how to test for differences in population proportions. To do so in R we use the command prop.test ( )

How nurse educators combine activity to create a lesson : In this Discussion, you examine how nurse educators combine an on-site activity with an online activity to create a comprehensive, learner-centered lesson.

Detailed analysis of the nominated market : MAN301 - Strategic Management - Situational Analysis and Strategic Recommendations Report - Stotts An overlap of corporate ownership of some of these retailers.

What a nurse might contribute to decisions : Consider what a nurse might contribute to decisions made at each stage of the SDLC when planning for new health information technology.

Assume the following information for a bank quoting : Assume the following information for a bank quoting on spot exchange rates:

User Account

All Pages