Question

Interpret R code answer ABC

This is a coded variable such that a value of 0 represents 'no injury', 1 represents 'possible injury', 2 represents 'no incapacity', 3 represents 'incapacity', and 4 represents 'killed'.

> Severity  

  [1] 3 1 3 2 3 0 0 0 3 3 2 3 3 1 1 1 2 0 3 3 0 1 2 0 1 3 0 3 0 3 0 3 1 2 2 4 2 

 [38] 3 1 1 3 3 3 3 2 1 3 3 0 1 2 3 0 3 3 3 0 0 1 3 1 0 3 3 0 1 0 3 1 0 1 3 3 0 

 [75] 3 3 0 3 3 2 2 2 0 1 3 3 4 3 2 3 2 0 0 3 1 3 0 2 1 3 0 2 3 0 0 0 1 0 0 1 1

[112] 0 0 3 3 1 3 3 2 1 2 0 3 1 0 3 1 3 3 1 3 3 0 0 2 2 1 3 3 0 0 1 2 3 0 0 1 2

[149] 2 3 0 0 1 0 3 3 3 3 2 2 1 2 0 0 1 1 1 3 1 3 4 2 1 2 0 1 2 1 0 1 3 3 3 3 4

[186] 0 3 3 1 4 0 0 0 0 0 1 0 0 0 0

Levels: 0 1 2 3 4

> count <- summary(Severity)

> count 

 0  1  2  3  4

56 42 29 68  5

> prop.test(count[4],sum(count),p=.4,alternative='less',correct=FALSE)



        1-sample proportions test without continuity correction



data:  count[4] out of sum(count), null probability 0.4

X-squared = 3, df = 1, p-value = 0.04163

alternative hypothesis: true p is less than 0.4

95 percent confidence interval:

 0.0000000 0.3969047

sample estimates:   p 0.34 

Answer abc

1. A- What hypotheses are being tested by the last line of code? Give both the null hypothesis and the alternative hypothesis
2. B -What is the p-value associated with this test?
3. C -The first item specified in prop.test is count[4]. What is the value of count[4]? That is, if you were to enter count[4] in the R console, what value would be returned?

Answer 1

From e given out pu Counb 4J68 The yal 6 is Retun