Integration by Parts Homework
Perform each of the following integrations by using the easiest method you can ﬁnd ~ not
all problems require integration by parts necessarily:
in '
(a) lxe~2xdx
(b) l x3exdx
3
(c) Ixzex dx
(d) l tln(t + Ddt
(lnx)2
x
"(8H

—angrarn—anu—wewe1 agerroyearsm lEbb, rememaumumaamumqnsarrpremm‘;
television viewers in each age group is randomly selected, and the number who watch the station’s
11 pm. news is found for each sample. The results are given in the table below.
Age Group

Insert your answers to Question 6(a)(d) below this line
a)
multiple R- In different relapse, the various RR is the coefficient of numerous relationship,
though its square is the coefficient of determination. RR can be deciphered to some degree
such as a

What is hypothesis testing? ( cont. )
Hypothesis Testing
ECE 3530 Spring 2010
A statistical hypothesis is an assertion or conjecture concerning one or more populations.
To prove that a hypothesis is true, or false, with absolute certainty, we would need a

Elmo 1:
E thaﬂlty density of oustotnars
per day at downtown location
Stone 2:
m thahiity donslty of oustomors
per day at a out-Urban looatlcln
You are the stafﬁng manager for a chain of restaurants. The probability distributions
for the number of custom

The reason for sampling a population instead of observing the population itself is that:
A. Observing the population may.r be impossible
B. Observing the population mav not be cost—effective
O. Observing the population may.r not be practical ifthe outcome

In a regression equation, the coefﬁcient of an independent variable represents:
A. The value of the dependent variable.
B. The v—intercept or constant.
’ C. The amount of dependent variable change for a one—unit change in the
associated independent variab

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e
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Given the following frequency distributions of returns from four different portfolios, which portfolio is the riskiest?
Frequency
a}*
—) Return
Frequency
{1}
Frequency
C}
At
—) Return —) Return
Your answer is cor

Determine whether the following statement is true or false:
A probability.r distribution is a curve that depicts historical outcomes and is not useful as
a predictor of future outcomes of a random variable.
TRUE
"’ FALSE
Your answer is correct.
An SHE“ b

You conduct hvpothesis tests around a regression coetﬁcient when vou want to:
A. Statistic allyr prove that the true regression coefﬁcient is less than or greater
than a particular level for a given level of signiﬁcance.
B. Statistic allyr prove that vour

Given a volatility.r of 13.33% and an average return of 1?.333’9, what is the [Ir-robabilily.r that a
future return will fall below 41.31%? Use the standard normal table SE to calculate the answer.
Instructions: Round onlyr the ﬁnal answer. Intermediate a

You are testing vehicles of the same brand and model to determine their gas mileage.
After testing 100 vehicles, vou have calculated the sample mean is} to be 25 mpg and
the sample standard deviation is} to be 2.1 mpg. To have a better idea of the accurac

A standard normal distribution is
a} a generic name for any.r probability.r distribution.
' b} a particular normal distribution, with a mean of zero and a standard deviation of
one.
c} the same as a normal distribution.
d} a distribution where the mean is

plugruln allu vlewur age [ID years UI "cars, It! NJ on, on [U :14, on Lil router}. H. sarrple Ul gnu
television viewers in each age group is randomly selected, and the number who watch the
station’s 11 pm. news is found for each san'ple. The results are g

{b} For each cell, calculate the corresponding cell, row, and column percentages. {Round your
answers to the nearest whole number.)
Watch Do Not
Tennis Watoh Tennis
Drink Wine Cell: 6 ﬁt. Cell: 42 %
Row: 13 ‘ll. Row: 83 %
Column: 30 ‘lt. Column: 53 %
Do N

DEDAN KIMATHI UNIVERSITY OF TECHNOLOGY
CHEPKWONY CHEBET MERCY
B012-01-0440/2014
ENVIRONMENTAL ISSUES IN BUSINESS
ASSIGNMENT
DISCUSS THE METHODS OF WASTE DISPOSAL AND HOW THEY AFFECT
THE ENVIRONMENT AND BUSINESS IN URBAN AREAS
METHODS
1. LANDFIL
This is th

1.BOYLES LAW
Can be defined as the volume of a mass of gas is inversely proportional to its pressure.
From the formula P1V1=P2V2 find V2
Where by P1 is initial pressure, P1=1 atm
V1 is initial volume,V1=500ml
P2 is final pressure , P2 =0.5atm
V2 is final

After inplementation of the computerized system. a random sample of 500 invoices gives the
following error distribution:
Errors per Inmioe 0 1 2 3 More Than 3
Number of Invoioes 4T? 9 6 5 3
pi Ei ﬁ if — E} " 2iE
0.33 41 5 4? 9.202?
0.10 50 9 33.0200
0.04

A marketing research ﬁrm wishes to study the relationship between wine consumption and whether
a person likes to watch professional tennis on television. One hundred randomly selected people
are asked whether they drink wine and whether they watch tennis.

A marketing research firm wishes to studyr the relationship between wine consumption and
whether a person likes to watch professional tennis on television. One hundred randon‘ty selected
people are asked whether they drink wine and whether they watch tenn

(b) For each cell, calculate the corresponding cell, row, and column percentages. (Round your
answers to the nearest whole number.)
Watch Do Not
Tennis Watch Tennis
Drink Wine Ceil= ﬁ 0% Cell: ﬂ 0%
Row: 13 9% Row: ﬁ 0%
Colunn= ﬂ 9% Column: 13 0%
Do Not Dr

tennis are Independent events.
Explanation:
in)
.2 _ (6-1012 was)? (14-1012 (36-4212
3" — T + T + T + T
= 1.350 + l1338 4- 1.246 + 0.312 = 3.246
H0: whether a person drinks wine and whether a person watches tennis are dependent versus H3:
2
independent. S

Expected oomte are below observed comte
Accident No Accident Total
l-leallryr 11 B 1?
3. TB 3.24
Moderate 9 9 13
9.2? 3. ?3
Nonamoker 14 1? 31
1 5.9? 1 5.03
Total 34 32 BB
Ci‘i- = 1.?0, DF = 2, P-Value = 0.42?
{a} For each row and column total in the ab

{b} For each cell in the above table, ﬁnd the corresponding cell, row, and column percentages.
{Round your answers to 2 decimal places.)
Accident No Accident
Heavy Cell: 19.97 '1": CEeII= 9.99 ‘39
Row: 64.71 “34: Row: 35.29 %
Column: 32.35 ‘38

iDUf clienl IS 3 IT'IEIHEIBCIUHDQ companv WDHE BEBE! "E numEr DI HEIECIWE pails
produced bv its production lines at its Nebraska plant. You design a one—tailed test to
prove that the dollar value of defects id} per dayr is less than $5,000. You establish