Practice Quiz 1
Statistics 0200
Dr. Nancy Pfenning
Spring 2013
1. (5 pts.) An article entitled Moderate walking helps the mind stay sharper reports that
elderly people who walked at least ninety minutes a week were less likely to suer from
mental impairme
Practice Quiz 11
Statistics 200
Dr. Nancy Pfenning
Spring 2013
1. (10 pts.) Salary (in millions) was regressed on batting average for a sample of 6 baseball
players in 2004.
The regression equation is
Salary = - 28.9 + 122 BattingAverage
Predictor
Coef
SE
Practice Quiz 10
Statistics 200
Dr. Nancy Pfenning
Spring 2013
1. (4 pts.) Some shoppers were observed in supermarket bakery departments that provided tongs and others were observed in departments that provided tissues. A researcher recorded how many peop
Practice Quiz 2
Statistics 200
Dr. Nancy Pfenning
Spring 2013
1. (3 pts.) This boxplot shows prices for adult weekend ski lift tickets in various resorts
in the Middle Atlantic States for the winter of 2004.
LiftTicketPrice
60
50
40
30
20
10
(a) The shape
Practice Quiz 3
Statistics 200
Dr. Nancy Pfenning
Spring 2013
1. (4 pts.) The U.S. government reported on hate crimes for a recent year, noting whether
the oender was black or white and whether or not the crime was due to the victims
sexual orientation. T
Practice Quiz 4
Statistics 0200
Dr. Nancy Pfenning
Spring 2013
1. (5 pts.) A large group of drivers participated in an online survey about their driving
habits. This table shows the probability of the respondents driving various types of
cars.
Type
Probab
Practice Quiz 5
Statistics 0200
Dr. Nancy Pfenning
Spring 2013
1. (2 pts.) A survey in 2001-2002 found the following probability distribution for Americans number X of visits to the emergency room in the preceding year:
X
Probability
0
1
2
3
4
5
0.78 0.14
Practice Quiz 6
Statistics 0200
Spring 2013
Dr. Nancy Pfenning
1. (4 pts.) In fall 2004, mean SAT score of all Pitt incoming freshmen was 1230. Assume
standard deviation was 120. The shape of the distribution was approximately normal.
area=.05
area=.05
ar
Practice Quiz 7
Statistics 200
Dr. Nancy Pfenning
Spring 2013
1. (5 pts.) A survey asked 1000 adult Americans in the year 2004, Should elected ocials
set their convictions aside to get results in government?; the proportion who answered
yes was 0.74. Supp
Practice Quiz 8
Statistics 200
Dr. Nancy Pfenning
Spring 2013
1. (10 pts.) Number of calves sired by a sample of 10 captive Beluga whales had mean
1.5. Assume population standard deviation to be 1.4.
(a) Set up a 95% condence interval for the mean number
Practice Quiz 9
Statistics 200
Dr. Nancy Pfenning
Spring 2013
1. (5 pts.) Domestic goats follow gaze direction and use social cues in an object choice
task, published online in Animal Behavior in January of 2005, included information on
goats performance