Assignment 5  Tests for Variances
Hypothesis tests for population variances
1.
Based on Section 9.6 of the text on page 384. Airlines face the challenging task of keeping their
planes on schedule. One key measure is the number of minutes a plane deviates
Quiz
Note: It is recommended that you save your response as you complete each question.
Question 1 (2 points)
When someone is on trial for suspicion of committing a crime, the hypotheses are:
H0: guilty
H1: innocent
Which of the following is correct?
Ques
Econ 222: Solution Template Assignment 3, question 1.
My data set number is: AB11
AgriBeef Inc. operates cattle feed lots in several Midwestern states. The company
wishes to estimate the average weekly weight gain of cattle on their lots. To do this a
si
ECON 222
Assignment 2 Hypothesis Testing
For each of the following problems, (a) identify the population parameter of interest, (b)
define the random variable, and (c) state appropriate null and alternative hypotheses.
1. General Electric has developed a
*Z TABLE


ONLY MEASURES RIGHT TAIL*
H0:
3
x
H1 = alternative,
mean not
samples
the
(BAD)
o
o
Only
used
H0 = h naught / null, what is assumed
 H0: 3 (GOOD)
for
population
hypothesis
that is believed (or needs to be supported) by
the researcher, hence i
Paige Secco
Assignment 4
Acme Company is considering implementing a new job design for its assembly plants. A job design is a
layout of assembly tasks and sequences. It is very expensive to redesign an assembly line and implement
a new job design. The com
Paige Secco
Assignment 2
For each of the following problems:
(a) identify the population parameter of interest
(b) identify if its a one or two tail test
(c) state appropriate null and alternative hypotheses.
Problem 1: General Electric has developed a ne
Paige Secco
Assignment 3
Problem 1: AgriBeef Inc. operates cattle feed lots in several Midwestern states. The company
wishes to estimate the average weekly gain of cattle on their lots. To do this a simple random
sample of cattle is taken and the weekly
Justin Murray Takehome test #2 32708
Question #1
A. Long term economic growth comes from increasing the quality and quantity of factors of production in the economy. Some of these factors of production are natural resources, labor resources, and
Hypothesis test for two independent proportions
p1
0.1786
23/140
25
140
p2
0.15
9/60
9
60
0.0286
0
0.058
0.49
.6221
pc
0.17
33/200
34
200
p (as decimal)
p (as fraction)
X
n
difference
hypothesized difference
std. error
z
pvalue (twotailed)
0.0818 confi
Hypothesis Test: Paired Observations
0.000
53.750
50.500
3.250
1.488
0.526
8
7
hypothesized value
mean Group 1
mean Group 2
mean difference (Group 1  Group 2)
std. dev.
std. error
n
df
6.18 t
.0005 pvalue (twotailed)
2.006 confidence interval 95.% lowe
TwoSample hypothesis testing assignment
A. Acme Company is considering implementing a new job design for its assembly plants. A job design is a layout of assembly tasks and sequences. It is very
expensive to redesign an assembly line and implement a new
Econ 222: Solution Template Assignment 3, question 1.
My data set number is:
X = weekly weight gain of cattle on AgriBeef feed lots.
x = mean weekly weight gain of all cattle on AgriBeef feed lots.
Report the following:
H0:
H1:
Using = 0.05, Report the
A national distributor of "Eagle" brand snacks is attempting to develop a model to explain sales of their
product. To do so, data have been gathered on monthly sales (measured in hundreds of dollars) from its many
marketing areas. From these, sixty observ
Justin Murray Freakonomics chap 3 questions 41408
Question #1.
I believe the main economic topic in this chapter is how similar drug dealers are to ordinary corporations. I was very surprised to see how very similar these drug cartels were to ord