2007 Rev Test 3

# 2007 Rev Test 3 - Review for Test 3 I At a local four-year...

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

Review for Test 3 I. At a local four-year college, 43% of the student body are Freshmen. A random sample of 40 student names taken from the Dean’s Honor List showed that 15 were Freshmen. Does this indicate the population proportion of Freshmen on the Dean’s Honor List is different from 43%? Use 5% level of significance. a. State the null and alternate hypotheses. b. Is n = 40 a large enough sample to permit the use of a Z test statistic? Prove. c. Sketch the rejection region and show the critical values on the sketch. d. Compute the value of the sample test statistic and show it’s location on the sketch of part (c). e. Find the P- value for the sample test statistic. f. Give a conclusion and explain it in simple non-technical terms. II. Complete each sentence by putting an appropriate word, symbol, or number in each blank. 1. For the t distribution with 15 degrees of freedom t .05 = __________________. 2. If t has 12 degrees of freedom, then P (t < -3.055) =_______________________. 3. If you reject the null hypothesis when it is true , you make a Type error. 4. In a confidence interval for the population proportion, the confidence level represents the proportion of intervals, out of many created that contain the ___________________________________________. 5.

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 12/11/2011 for the course STA 2122 taught by Professor Staff during the Fall '08 term at FIU.

### Page1 / 3

2007 Rev Test 3 - Review for Test 3 I At a local four-year...

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

View Full Document
Ask a homework question - tutors are online