Stat 3310 - Stat Movie
August 26, 2011
1. According to JD Power and Associates, the mean wait for an airport
rental car shuttle bus in 2004 was 19 minutes. In 2005, a random sample of
40 business travelers showed a sample mean of 15 minutes with a standar
Orre Wa1'ANOVA Exercise Solutions
1.
\t'
arc intr:r'cstcrl irr the strengths of z1 diffcront kinrls of boxcs. \Vc ran<lomlY sclcct
boxes It'orn celch ol the ,1 kinds. Those -1 kinds represent 4 treatments. This is a completcly
rirndornized dosign: or a on
One \ray ANOVA Exercises
1. \'e ale intcrcsted in the strengths of 4 different lcinds of boxes. \,re randornlv seler:t
I;oxers frorn each of tlie 4 kinds. Those 4 kinds represent 4 treatments. This is a cornpletell,
randomized design; or a one u,ay ANOVA.
Answers to extra Fake
1. Check for coin
1. H0 : p = 0.5 vs. H1 p = 0.5
2. Test statistics
8
= 0.32,
25
0.32 0.5
=
,
p =
Z
0.5(10.5)
25
=
0.18
= 1.8
0.1
3. Get the rejection region:
0.5
0.05
= 0.5
,
2
2
= 0.5 0.025 = 0.4750,
Z = 1.96.
If Z > 1.96 or Z <
Stat 3310 Practice Problems
September 18, 2013
1. A coin is to be tested for fairness. It is tossed 25 times and only 8
heads are observed. Test the claim that the coin is fair; that is, p = 0.5. Let
= .05.
2. A manufacturer of golf balls claims that the