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Describing Distributions with Numbers Measures of Spread
1. Based on the level of measurement of a variable, know the appropriate measures of spread.
2. For a given variable, be able to calculate and interpret:
b. Quartiles (Q1,
BUAL 2310-48 Business Analysis I Fall 2016
Instructor: Dr. Ashraf El-Houbi
Office: Galloway Business, Room 270 Tel: (409) 880-8637
Modern Business Statistics with Microsoft, 5th Editio
Describing Distributions with Numbers: Measures of Center
1. Based on the level of measurement of a variable, know the appropriate measures of center.
2. Be able to calculate and interpret the mean, median, and mode of a variable.
3. Understand whic
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Displaying Distributions with Graphs
1. Be able to create a frequency table from a small data set.
2. Understand what information can be obtained from a frequency table.
3. Understand the purpose of a graph.
4. For the following graphs:
BUAL 3310 Review sheet for Exam 1
Exam 1: Test will include Chapter 1, Chapter 2, and Chapter 3 and 4.1-4.4
Q1) In the following multiple choice questions, circle the letter in front of the correct
1. The population variance is represented by the s
Formula Sheet BUAL 3310 Exam 1
Width of Interval = (Max-Min)/# of classes
Median= (n+1)/2 ranked value
s 2 ( xi x ) 2
( xi ) 2
CV= ( S/ )100%
cov( x, y )
BUAL 3320-048 Business Analysis II Spring 2016
Instructor: Dr. Ricardo Tovar-Silos
Welcome to Lamar University. My name is Ricardo Tovar-Silos and I am an Assistant
Professor at the Department of Information Systems and Analysis at t
510 Chapter 12 Tests oi Goodness oi Pi! and Independence
Host A Con Mixed Pro
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Mixed 8 l3 1 1
Pro [0 9 64
Use the chi-square test ofindependence with 21.0} level of signiﬁcance to analyze the dam
What is your conclusion?
12.3 Goodness of
Notes on Hypothesis testing when the standard deviation of the population 0 is unknown.
If the standard deviation of the population 0 is unknown, we need to replace it with its point estimator
which is the standard deviation of the sample 5.
The test stat
Review Final Exam BUAL 3320
THE NEXT SIX UESTION S ARE BASED ON THE FOLLOWING INFORMATION:
A real estate appraiser is interested in determining the factors that determine the price of a house.
She wants to run the following regression:Y = 60 + )3le
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Name: Class: Date:
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The average expenditure on Valentine's Day was expected lo be 33 [00.89 (USA ibdrrv. Februar}r I3, 2006
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Name: Class:_ Date:
Name: Class:_ Date:
Exerei l l
A market research ﬁrm used a sample of individuals to rate the
Review Chapter 13
1. Allied Corporation wants to increase the productivity of its line workers. Four different programs have
been suggested to help increase productivity. Twenty employees, making up a sample, have been
randomly assigned to one of the four
LA sample of 20 cans oftoniatoju ice showed a standard deviation of 0.4 ounces. A 95% conﬁdence interval
estimate ol'the variance For the population is
a. 0.2313 to 0.8533
b. 0.2224 to 0.7924
c. 0.0889 to 0.3 I 69
0.0925 to 0.34 I 3
l\‘ 10) S; Cl’
Exam l Rcvierv
Annual pe-r capita consurnption ul'rnilk is 2 I .6 gallons rvith a statrdarel dcviatiorl of 4.8 gallons.
lleing fiom thl Mid*.est. 1,ou bcli*vc nrilk cunsunrption is higher thcrc and wish to stlppofl your
opin[rn. A sample ocfw_ 30 irrdivic
Three different methods for assembling a product were proposed by an industrial enginee
John Calipari, head basketball coach for the2012 national champion University of
Duringthe first l3 weeks of the television season. the Saturday evening 8:00 p.m. to 9
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The data from exercise 1 follow.
Excel File: datal 4-23.xls
Compute the mean square error using equation (14.15) (to 3 decimals).
S- =- \|(L
The exercise involving data in this and subsequent sections were designed to be solved using Excel.
The owner of Showtime Movie Theaters, Inc., would like to predict weekly gross revenue as a
Given are five observations tbr trvo variables.x and v.
Excel file: datal 4-01.xls
: -l 4
7 -q tl
Which of the fol
The Condd Nast Tvweler Gold List for 2012 provided ratings for the top 20 small cruise ships (Cordd Nast Trweler website, March
2012). The following data shown are the scores each ship received based upon th
Which is cheaper: eating out or dining in? The mcan cost of a flank steak. broccoli"