hypothesis thal elOIUD the United States? 3. What is normal body temperature? Th

Question

hypothesis thal elOIUD the United States? 3. What is normal body temperature? The standard has been 98.6°. Su medical worker suspects that body temperatures in children in Sodor than the norm. She obtains measurements from a random sample of 18 ch and finds the following: 98.0 98.9 99.0 98.9 98.8 98.6 99.1 98.9 98.5 98.9 98.9 984 99.0 99.2 98.6 98.8 98.9 98.7 (a) What are the hypotheses to test? (b) Carry out the test and state a conclusion in a complete sentence. 4. Suppose the number of births per month in Sodor can be modeled by a Poisson random variable with parameter > 0, The town elder claims that, on average, there are 15 births per month, but you suspect it is more. If in 1 month, there are 20 births, does this support your hypothesis? 5. Geologists wonder if the surface soil pH levels at two different locationsf certain desert site are similar. The scientists obtained the following pH levels at randomly selected points within each of the two locations. Location A | 8.53 8.52 8.01 7.99 7.93 7.89 7.85 7.82 7.80 Location B 7.85 7.73 7.58 740 735 70 1

Explanation / Answer

Result:

R code:

poisson.test(20, r=15, alternative = c("greater"))

Routput:

Exact Poisson test

data: 20 time base: 1

number of events = 20, time base = 1, p-value = 0.1248

alternative hypothesis: true event rate is greater than 15

95 percent confidence interval:

13.25465      Inf

sample estimates:

event rate

        20

Calculated p=0.1248 which is > 0.05 level.

Ho is not rejected.

There is no evidence to conclude that event rate is greater than 15.

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