204 exm4 sp10 - Math 2040 exam 4 spring 2010

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Math 2040 exam 4 spring 2010 Name______________________________ SHOW YOUR WORK TO RECEIVE CREDIT 1 ) A statistical test was performed as follows: Ho: = 42 sample mean 40.4 = 4.8 n =16 Ha: < 42 Assuming the sample means are normally distributed: a) What is the p-value of the above test? _________ b) Interpret what this value means with respect to the above Ho. ____________________________________________________________________ ____________________________________________________________________ 2) A large city on the Atlantic coast sends treated sewage out to the ocean by means of pipe extending mile into the ocean. A marine ecological researcher studied the effect of the sewage on the sea-floor biomass of organisms for 8 different types ocean bottom near the pipe Sea-floor biomass (kg/m 2 ) Ocean bottom type 1 2 3 4 5 6 7 8 50 meters from pipe outflow 2.4 2.1 1.9 2.0 1.5 1.1 0.9 0.5 300 meters from pipe outflow 2.2 2.1 1.5 1.8 1.2 0.8 1.0 .4 Is this sufficient evidence at the 5% significance level that the biomass is larger at 50 meters from the pipe outflow compared to 300 meters? __________ 3) A group of archeologists want to test if the proportion of amphora jars having a polychrome style is less at a particular site level than the 20% at lower levels so they take sample of 32 amphora at that level and find 4 are of polychrome style. are of polychrome style....
View Full Document

Page1 / 4

204 exm4 sp10 - Math 2040 exam 4 spring 2010

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online