07F_QUIZ1B

# 07F_QUIZ1B - WEB-DISTANCE ST 370 Quiz 1 FALL 2007 ver B NAME ID I will neither give nor receive help from other students during this quiz Sign

This preview shows pages 1–3. Sign up to view the full content.

WEB-DISTANCE ST 370 Quiz 1 FALL 2007 ver. B NAME_______________________________________ ID # _________________________________________ I will neither give nor receive help from other students during this quiz Sign ___________________________________________ PROBLEM 1: If the number 3 is added to every member of a sample of observations (as might happen if an ohm meter was not zeroed before doing measurements) THEN a) the sample standard deviation of the sample does not change b) the sample variance is increased by 9 times c) the sample variance is increased by 3 times d) the sample mean does not change e) the sample median does not change PROBLEMS 2 and 3: A sample of 5 cars parked along the Hillsborough Street across from the library revealed the following data on the NUMBER OF M&M’s on the floor under the passenger-side seat 33, 7, 3, 54, 12 2) The value of the (Sample Mean MINUS the Sample median) for this dataset is : a) 5.2 b) 9.8 c) 18.5 d) 12.3 e) none of these 3) What is the 37 th percentile for this dataset a) 9.6 b) 8.4 c) 8.1 d) 7.4 e) none of these 4) How is the correlation coefficient r related to the least squares slope b a) r = b s X / s Y b) r = s X /( b s Y ) c) r = b s Y / s X d) r = s Y / (b s X ) e) none of these

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

View Full Document
Problem 5 : The following lm output on response of time from 0 to 60 mph for different tire pressure and weight in trunk of car indicate which terms are statistically significant a) intercept, weight, pressure b) only intercept and weight c) only weight* pressure d) no terms are significant e)
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 01/16/2012 for the course ST 370 taught by Professor Nail during the Fall '08 term at N.C. State.

### Page1 / 8

07F_QUIZ1B - WEB-DISTANCE ST 370 Quiz 1 FALL 2007 ver B NAME ID I will neither give nor receive help from other students during this quiz Sign

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online