It is required to find out the day night equivalent noise levels
at location. The three...
It is required to find out the day night equivalent noise levels
at location. The three hourly day average values in dB are
45,58,50,61,64 and the three hourly night average values in dB are
48,42,28. compute Ldn.
An acoustical engineer is studying noise levels in center cities
with day of the work week. She takes measurements each day of the
week for four weeks at the same intersection and at the same time
(5 pm). The following measurements (decibels) were taken:
M
Tu
W
Th
F
66
76
66
73
70
71
74
73
67
66
70
73
68
67
65
65
75
71
71
67
(a) Does the noise level differ from day-to-day? Use a 5%...
An acoustical engineer is studying noise levels in center cities
with day of the work week. She takes measurements each day of the
week for four weeks at the same intersection and at the same time
(5 pm). The following measurements (decibels) were taken:
M
Tu
W
Th
F
66
76
66
73
70
71
74
73
67
66
70
73
68
67
65
65
75
71
71
67
Use a 5% level.
(a) perform a Tukey multiple comparison test...
You need to find out if location affects death R for viral
influenza. You find out the death R for 10 Americans and 10
foriegners:
(a) Infer the mortality rate across everyone has a normal
distribution and the variance for americans is equal to the
variance for foriegners. Test whether the mean death R in Americans
is higher than that in foriegners at a 5% significance level.
(b) In previous question, we assume that the variances of death
rates in...
At a particular location in your house, three appliances make
sound intensity levels of 73.2 dB, 76.1 dB, and 69.2 dB
individually. What is the sound intensity level at that location
when they are all running at the same time?
1. Assume researchers are trying to find out the mean
concentration levels of a specific drug in a population of
individuals’ blood during a clinical trail. The researchers find
that the sample population n= 100 has a mean concentration of 225
ng/mL with a standard deviation of 47 ng/mL. Calculate a 95%
confidence interval for the mean concentration level of the
medication for the population’s blood and interpret it.
[1] The researchers are 95.0% confident the true mean
concentration of...
USE PYTHON to find out
What day of the week is a given date? i.e. On what day of the
week was 5 August 1967? if it is given that 1 January 1900 was a
tuesday
Write a function is_leap() which takes 1 input argument, an
integer representing a year, and returns True if the year was a
leap year, and False if it was not.
.Then, write a function days_since() which takes 3 input
integers day, month, year, representing...
Go to the Yahoo! Finance website and find out the required
information in table below for two companies Toyota Motor
Corporation (ticker “TM”) and Ford (ticker “F”).
You need to provide the date when you are reporting on
companies. (If information is not available put NA)
Considering collected information, compare the performance of
this two companies in terms of profitability.
Name of company
Toyota
Ford
Date of report
Bid
Ask
Volume
Market Cap
P/E
EPS
Div. &...
Find the work (in ft-lb) required to pump all the water out of a
cylinder that has a circular base of radius 6 ft and height
200 ft. Use the fact that the weight-density of water is
62.4 lb/ft3.
Find the work (in ft-lb) required to pump all the water out of
the cylinder if the cylinder is only half full.
what are some tools/strategies I can use to find out
about the interests and ability levels of students? How could I use
this information to meet individual needs?
The manager wants to find out the average (population mean) time
required to inflate a rubber raft. Assuming that the manager knows
the population standard deviation is 1.6 seconds. A random sample
of 45 rafts is inflated, yielding an average inflation time of 7.6
seconds (sample mean). Using sample information to construct:
(i) 95% confidence interval for the average inflation time of all
rubber rafts.
(ii) 99% confidence interval for the average inflation time of
all rubber rafts.