Viviana Verastegui
TMTH-3360
INFERENCE FROM SMALL SAMPLES
10.9
In a study of the effect of cigarette smoking on the carbon monoxide diffusing capacity (DL) of the lung,
researchers found that current smokers had DL readings significally lower than those o
Problem 1:
You are the operations manager for an OEM manufacturing plant that produces YBOX game c
Based on the sales record from 2010, the marketing manager forecasts the demand for Janua
January
2,500
February
3,000
Relevant information includes:
Produc
Review Test Submission: Practice Test 1
User
Course
Eduardo Monsivais
2016FA-19990-TMTH3360-Applied Technical
Statistics
Test
Practice Test 1
Started
9/26/16 1:30 PM
Submitted
10/1/16 10:50 PM
Status
Completed
Attempt Score 42 out of 100 points
Time Elaps
Review Test Submission: Chapter 01 Quiz
User
Eduardo Monsivais
Course
2016FA-19990-TMTH3360-Applied Technical Statistics
Test
Chapter 01 Quiz
Started
9/5/16 9:27 PM
Submitted
9/5/16 10:17 PM
Attempt
80 out of 100 points
Score
Question 1
5 out of 5 points
Review Test Submission: Chapter 04 Quiz
User
Eduardo Monsivais
Course
2016FA-19990-TMTH3360-Applied Technical Statistics
Test
Chapter 04 Quiz
Started
9/26/16 9:40 PM
Submitted
9/26/16 10:37 PM
Due Date
9/26/16 11:59 PM
Status
Completed
Attempt Score
70 ou
Review Test Submission: Chapter 03 Quiz
User
Eduardo Monsivais
Course
2016FA-19990-TMTH3360-Applied Technical Statistics
Test
Chapter 03 Quiz
Started
9/19/16 8:40 PM
Submitted
9/19/16 9:29 PM
Due Date
9/19/16 11:59 PM
Status
Completed
Attempt Score
65 out
3.15 Grocery Costs. These data relating the amount spent on groceries per week and the number of household
members are from Example 3.3: x 2234 15 y $95.75 $110.19 $118.33 $150.92 $85.86 $180.62
a. Find the best-fitting line for these data.
b. Plot the po
Review Test Submission: Excel Quiz
User
Course
Eduardo Monsivais
2016FA-19990-TMTH3360-Applied Technical
Statistics
Test
Excel Quiz
Started
8/29/16 8:36 PM
Submitted
8/29/16 8:56 PM
Due Date
8/29/16 11:59 PM
Status
Completed
Attempt Score 50 out of 50 poi
4.1 Tossing a Die. An experiment involves tossing a single die. These are some events:
A: Observe a 2
B: Observe an even number
C: Observe a number greater than 2
D: Observe both A and B
E: Observe A or B or both
F: Observe both A and C
E1
E2
E3
E4
E5
E6
1.10
Category Frequency
A
B
C
D
Percentage
11
14
20
5
22%
28%
40%
10%
50
100%
Proportion
0.78
Proportion
0.72
1.11
State
CA
AZ
TX
Jeans
Percentage
9
8
8
Total
CA AZ AZ TX CA CA CA TX TX TX AZ AZ CA AZ TX CA AZ TX TX TX CA
36%
32%
32%
25
1.14
Age
As of 1/0
Review Test Submission: TMTH3360 Syllabus
Quiz
User
Course
Eduardo Monsivais
2016FA-19990-TMTH3360-Applied Technical
Statistics
Test
TMTH3360 Syllabus Quiz
Started
8/24/16 10:43 PM
Submitted
8/24/16 11:54 PM
Due Date
8/29/16 11:59 PM
Status
Completed
Atte
Review Test Submission: Chapter 02 Quiz
User
Eduardo Monsivais
Course
2016FA-19990-TMTH3360-Applied Technical Statistics
Test
Chapter 02 Quiz
Started
9/12/16 8:45 PM
Submitted
9/12/16 9:41 PM
Due Date
9/12/16 11:59 PM
Status
Completed
Attempt Score
90 out
28b345ced740b276f8bcc4f070bf1b67a26da5fa.xls
3.15
Grocery Costs
These data relating the amount spent on groceries per week and the
number of household members are from Example 3.3:
x
y
2
2
3
4
1
5
$ 95.75 $ 110.19 $ 118.33 $ 150.92 $ 85.86 $ 180.62
a. Fin
NAME:
Please show all work and do all work under the problem (not beside it)
Feel free to add rows if needed
Label your answer
1
Students in a stat course were asked how many internet activities they engaged in in a typical
week. Here are the results:
6
7
2b3dd84cf5a629ea79497bd3a1e649bfa95f96dc.xls
1.11
Jeans
A manufacture of jeans has plants in California, Arizona, and Texas. A
group of 25 pairs of jeans is randomly selected from the computerized
database, and the state in which each is produced is recor
2dc57c87f5a2128608c107b72b56702b4f607b17.xls
5.9
a.
b.
c.
d.
e.
f.
Let x be a binomial random variable with n = 10 and p = 0.4. Find these
values:
P(x = 4)
P(x 4)
P(x > 4)
P(x 4)
= np
= npq
Solutions
a. =BINOMDIST(4,10,0.4,FALSE)
b. (x 4) = 1 - (x 3)
=1
8f130993ff4906bfcdcaae786737d4c36b5ca080.xls
4.1
Tossing a Die
An experiment involves tossing a single die. These are some events:
A: Observe a 2
B: Observe an even number
C: Observe a number greater than 2
D: Observe both A and B
E: Observe A or B or bot
Usually a large pizza feeds 5 students with a standard deviation of 1.3 students.
What percent of the time will a large pizza feed more than 10 students?
0.9999400068 5.99932E-005
I order a pizza and it feeds 7 students? Is that unusual?
Yes
0.9380320972
Chapter 2
2.2 Measures of Center
Mean - average
sample mean is called x population mean
Is an average always meaningful? Here's a fact: the average American has one testicle a
Too extreme? Here's another example. Students come to me and say "Prof Tellege
Example: Random Variable/Expected Value
You pay $4 to play the following game.
Roll one dice. You receive the amount showing on the dice.
1.
Is this a fair game?
2.
If you played this game 100 times, how much would you win/lose?
3.
What is the standard de
c811f21f4685faf0c1348b94ad1e10a56055872d.xls
2.5
DVRs
The DVR is a common fixture in most American households. In fact,
most American households have DVRs, and many have more than
one. A sample of 25 households produced the following
measurements on x, th
10: Inference from Small Samples
10.1
10.2
Refer to Table 4, Appendix I, indexing df along the left or right margin and t across the top.
a t.05 = 2.015 with 5 df
b t.025 = 2.306 with 8 df
c t.10 = 1.330 with 18 df
c t.025 1.96 with 30 df
The value P ( t
Chapter 8
Section 8.2
Statistical inference - making predictions about parameters of a population from information in a sample
If an agricultural researcher is interested in the average yield per acre for a wheat crop he could take
2 approaches : what is
If you ever read a newspaper or magazine or listen to the news you'll hear statistics.
If you ever have to evaluate medical care or medication you'll use statistics.
If you ever invest any money you'll have to evaluate statistics.
No matter what your majo
Chapter 3
When we measure more than 1 variable we have bivariate data. We are often interested
in the relationship between the two variables.
This can be something like the relationship between education and income, or height and w
Is more education assoc
In real life situations you may be able to indetify if a distribution is normal or binomial,
but you may not know the paramters such as the mean or standard deviation. In this case a sample will provide parameters
with which you can work.
If you want a re
Chapter 6
When a variable is discrete, you can assign a probability to each x. The sum of those will b
one. However, continuous variables have an infinite number of values and each one cann
have a probability assigned to it.
What are examples? When I roll
Chapter Nine Statistical Test of Hypothesis
These are similar to the confidence intervals in Ch 8, but this chapter leads to a decision
involving a hypothesis.
We use two hypotheses: the alternative and the null which is its contradiction.
We begin by ass
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