Fall 2006 Test 2 Math 1P98

Fall 2006 Test 2 Math 1P98 - Test 2a Math 1P98 Friday Nov...

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

View Full Document Right Arrow Icon
Test 2a Math 1P98 Friday Nov 10 5:15-6:15 Name. .................................................................... Box. ................................ You may bring your empty envelope with one side used as a formula sheet with anything you like hand written on this side. (If a person has used both sides their mark will be cut in half.) The test must be put into the envelope to be handed in. Final answers should have at least 3 significant digits, so more digits must be kept throughout the question . A non-graphing calculator may be used. Good Luck! ........................................................................................................................................... [4] 1a . Construct the 95% confidence interval for the mean time taken for a new customer to find an item in a big box electronics store. A random sample of 35 people were asked and it took a mean time of 22.5 min with standard deviation 6.3 min. [3] b. In order to be 98% confident of being within 0.5 min of the population mean time, how many people would have to be surveyed? [2] c. To investigate whether a greeter would improve the time taken, a temporary greeter was used for a week. You are given two sets of times, for a random sample of 35 people without a greeter and for a random sample of 50 people with a greeter, and asked to analyse them to determine whether a greeter should be used. To do this you would use: ( circle one of the choices)
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/04/2011 for the course MATH Math 1P98 taught by Professor D.miners during the Fall '11 term at Brock University, Canada.

Page1 / 5

Fall 2006 Test 2 Math 1P98 - Test 2a Math 1P98 Friday Nov...

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