STAT 201 SPRING 2013
Edwards
PRACTICE EXAM II
1. Suppose that IQ test scores in the general population follow a Normal distribution with mean 100 and
standard deviation 15.
a) (5) Sketch the frequency
Chapter 7
Sampling Distributions
Larson/Farber 4th ed
1
Sampling Distributions
Sampling distribution
The probability distribution of a sample statistic.
Formed when samples of size n are repeatedly
Project 3
Case 1: American Oil Company
Given in this problem,
Mean
Standard Deviation
Capacitors needed
Level of confidence
12
1
800
98
%
It is also given that the supplier provides capacitors that op
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Use Sampling distribution Applet to find the shape of the graph, mean, median and
standard deviation of the sample proportions.
Applet procedure:
Step 1: Choose Bin
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a.
Construct relative frequency table of data.
Formula for relative frequency is given below:
Relative Frequency
Frequency
n
Therefore, the relative frequency tabl
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a.
Obtain the point estimate of p.
From the given data, the sample size
n
is 755.
Let p be the true proportion of all internet using adults who have paid to downlo
Chapter 2 & 3 Practice Problems
1. Find the class with the least number of data values.
A) 70
B) 90
C) 60
D) 40
2. Thirty students recorded the colors of their eyes, choosing from the colors brown, bl
Introduction to Economics Part 1
A. Macroeconomic and Microeconomics
Consider the following issues an economist might explore, determine whether it is a Macroeconomic or
Microeconomic problem.
a)
b)
c
Worksheet: Competitive Markets and Other Markets
Part A: Characteristics of Markets
Fill in the chart below describing each of the markets.
Number of
Sellers?
Competitive
Monopolisticall
y Competitive
Chapter 6
Normal Probability Distributions
Larson/Farber 4th ed
1
Properties of a Normal Distribution
Continuous random variable
Has an infinite number of possible values that can be
represented by a
1. The H0 will state that the class is not meaningfully different from the national
average. The Hawill non-directionally state that the class is either higher or lower
than the national average. The
1. The H0 states that the drug will have no effect on altering high blood pressure levels. The
Ha states that the drug will lower high blood pressure levels. The drug was successful in
lowering high b
1. 926 adults from a particular city were surveyed, producing the contingency table below. The
conditional percents (by row) are shown in parentheses in each cell for example, of those who
said premar
1. As mentioned in class, the Gleason grading scale is a 1-to-5 scale used to judge a prostate tumor
biopsy in order to gauge the aggressiveness of the cancer. A clinician rated 42 tumor biopsies on
t
1. Below is a scatter plot of distance punted (ft) versus right leg strength (lbs) for n=13
right-legged NFL punters. The least squares fitted line is summarized in bold below.
Distance punted (ft) =
1. Suppose the values below correspond to 2010 Medical College Admission Test (MCAT) scores
for seven randomly selected USC pre-med majors, expressed as their percentile rank among all
students taking
Chapter 6 Practice Test A
Name: _ Date: _
0. Which of the following would be normally distributed and why or why not?
a. The amount that a German Shepherd dogs eat
b. The age a German Shepherd female