Probability Density Function
Cumulative Distribution Function
Binomial with n = 5 and p = 0.21
Binomial with n = 5 and p = 0.21
x
0
1
2
3
4
5
6
7
8
9
P( X = x )
0.307706
0.408976
0.217430
0.057798
0.007682
0.000408
0.000000
0.000000
0.000000
0.000000
x P(
Chapter 3 Measures of Central Tendency and Variation
Homework Assignment Central Tendency and Variation: Chapter 3 Measures of central
tendency and variation.
Problem Definition: Cox Enterprises owns and operates a large cattle feedlot operation in the
pl
Armando Bendito
BIRCH
DSCI 346
1/20/16
CH. 9 HW
9.47 According to the Journal of the American Medical Association, resident doctors worked an average
of 59.3 hours per week at hospitals from 2006 to 2008. The Accreditation Council for Graduate Medical
Edu
Armando Bendito
DSCI 346
Chapter 10 on paper assignment
2/1/2016
10.49 The ontime performances of flights in the airline industry are an important measurement that can
help attract customers. The following date show the number of late flights from random
Armando Bendito
3/7/16
DSCI 346
Ch. 10 Onpaper HW
The socalled Blue Book for automobiles is frequently used to determine usedcar prices. A critical factor
in pricing used cars is the odometer reading, which is not directly included the Blue Book. A use
Armando Bendito
BIRCH
DSCI 346
1/20/16
CH. 9 HW
9.47 According to the Journal of the American Medical Association, resident doctors worked an average
of 59.3 hours per week at hospitals from 2006 to 2008. The Accreditation Council for Graduate Medical
Edu
Armando Bendito
2/3/2016
DCSI 347
BIRCH
Oneway ANOVA: C3 versus C2
Method
Null hypothesis
Alternative hypothesis
Significance level
All means are equal
At least one mean is different
= 0.05
Equal variances were assumed for the analysis.
Factor Informati
Armando Bendito
DSCI 346
Chapter 11 on Paper
2/10/2016
In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars)
was estimated. Five test vehicles of each type were crashed, with the re
Armando Bendito
DSCI 346
Chapter 12 OnPaper Assignment
1. A survey of randomly chosen new students at Kitty Cat University (KCU) revealed the data below concerning the
main reason for choosing this university instead of another. Research question: At alp
a. A frequency distribution is a table that shows the number of data
observations that fall into specific intervals
A class is a category in a frequency distribution
Relative frequency distributions display the proportions of each class
relative to the to
Karissa Weber
DSCI 245 Tuesday/Thursday 2pm
Chapter 5 Homework
Binomial
Problem Definition: If five teachers are selected at random from The Tenth Planet
Teachers and Technology survey, what is the probability that exactly three teachers use
the web, fewe
Karissa Weber
DSCI 245 Tues/Thurs 2pm
Chapter 8 HW
Problem Definition: Compute a confidence 95% confidence interval for holes drilled in a steel
plate.
Test:
The assumed standard deviation = 0.005
N
15
Mean
2.47500
SE Mean
0.00129
95% CI
(2.47247, 2.47753
Karissa Weber
DSCI 245 Tuesday and Thursday
Problem Definition: This study is being conducted to find the cumulative relative
frequency distribution of American Automobile Association (AAA) gasoline prices. The
number of prices studied in this case is 51,
Bin
Frequency
0 to under 3
5
3 to under 6
18
6 to under 9
9
9 to under 12
11
12 to under 15
6
15 to under 18
1
Dell Customer Support
Number of Customers
20
18
16
14
12
10
8
6
4
2
0
Minutes on Hold
port
on Hold
0.6
1.2
1.3
2.5
2.8
3.2
3.2
3.5
3.8
3.9
3.9
4
Percentage Polygon
40%
35%
30%
25%
Percent of wins
New York Yankees
Pittsburgh Pirates
20%
15%
10%
5%
0%

55
65
75
85
Number of wins per season
95
105
115
Cumulative Percentage Polygon
120%
100%
80%
Cumulative percent of wins
New York Yankees
Pittsburgh
Sampling Distribution of Sample Means
1) The mean of the sampling distribution of sample means is equal the mean of the
population from which the samples were taken.
2) The standard error of the estimate is less than the standard deviation of the
populati
Ch1
a. Primary data: data that you have collected for your own use
Secondary data: data collected by someone else that you are borrowing
b. Direct observation: a method of gathering data while the subjects of
interest are in their natural environment, oft