Question
In: Statistics and Probability
Voltage and Insulating Fluid. Researchers examined the time in minutes before an insulating fluid lost its...
Voltage and Insulating Fluid. Researchers examined the time in minutes before an insulating fluid lost its insulating property. The following data are the breakdown times for eight samples of the fluid, which had been randomly allocated to receive one of two voltages of electricity:
Times (min) at 26 kV: 5.79 1579.52 2323.70
Times (min) at 28 kV: 68.8 108.29 110.29 426.07 1067.60
(Please explain/list every step in details)
1. Form two new variables by taking the logarithms of the breakdown times: Y1 = log breakdown time at 26 kV and Y2 = log breakdown time at 28 kV.
2. By hand, compute a 95% confidence interval for the difference in mean log breakdown times. Take the antilogarithms of the endpoints and express the result in a sentence.
Solutions
orchestra answered 1 year agoRelated Solutions
A group of researchers estimates the mean length of time (in minutes) the average U.S. adult...
A group of researchers estimates the mean length of time (in
minutes) the average U.S. adult spends watching television using
digital recorders and other forms of time-shifted television each
day. To do so, the group takes a random sample of 40 U.S. adults
and obtains the times (in minutes) listed below. Assume the
population standard deviation to be 6.5 minutes. construct a 90%
and 99% confidence interval for the population mean.
29, 27, 28, 26, 14,28,32, 12, 16, 21, 17,...
Larkspur Company lost most of its inventory in a fire in December just before the year-end...
Larkspur Company lost most of its inventory in a fire in
December just before the year-end physical inventory was taken.
Corporate records disclose the following.
Inventory (beginning)
$ 80,000
Sales revenue
$410,800
Purchases
295,700
Sales returns
21,200
Purchase returns
28,300
Gross profit % based on net selling price
38
%
Merchandise with a selling price of $30,600 remained undamaged
after the fire, and damaged merchandise has a net realizable value
of $8,300. The company does not carry fire insurance on...
Taki Company lost most of its inventory in a fire in December just before the year-end...
Taki Company lost most of its inventory in a fire in December
just before the year-end physical inventory was taken. Corporate
records disclose the following.
Inventory (beginning)
$ 80,700
Sales revenue
$408,300
Purchases
291,500
Sales returns
20,900
Purchase returns
28,000
Gross profit % based on net selling price
35
%
Merchandise with a selling price of $30,500 remained undamaged
after the fire, and damaged merchandise has a net realizable value
of $7,700. The company does not carry fire insurance on...
A company studied the number of lost-time accidents occurring at its Brownsville, Texas, plant. Historical records...
A company studied the number of lost-time accidents occurring at
its Brownsville, Texas, plant. Historical records show that of the
employees suffered lost-time accidents last year. Management
believes that a special safety program will reduce such accidents
to during the current year. In addition, it estimates that of
employees who had lost-time accidents last year will experience a
lost-time accident during the current year.
a. What percentage of the employee will experience a lost-time
accident in both years (to 1...
A company studied the number of lost-time accidents occurring at its Brownsville, Texas, plant. Historical records...
A company studied the number of lost-time accidents occurring at
its Brownsville, Texas, plant. Historical records show
that of the employees suffered lost-time accidents last
year. Management believes that a special safety program will reduce
such accidents to during the current year. In addition,
it estimates that of employees who had lost-time
accidents last year will experience a lost-time accident during the
current year.
a. What percentage of the employee will
experience a lost-time accident in both years (to 1 decimal)?
b....
A pizza shop claims its average home delivery time is 27 minutes. A sample of 30...
A pizza shop claims its average home delivery time is 27
minutes. A sample of 30 deliveries had a sample average of 30.7
minutes. Assume the population standard deviation for the shop's
deliveries is 7.1 minutes. Complete parts a and b below. a. Is
there support for the shop's claim using the criteria that the
sample average of 30.7 minutes falls within the symmetrical
interval that includes 95% of the sample means if the true
population mean is 27 minutes?...
Suppose American Airlines quotes a flight time of 137 minutes for its flights from Irvine, CA...
Suppose American Airlines quotes a flight time of 137 minutes
for its flights from Irvine, CA to DFW.
Suppose we believe that actual flight times are
uniformly distributed between 110 minutes and 160
minutes. Answer the following questions.
a. The probability density function between the range is defined
as f(x)= .
b. Compute the probability that a flight from Irvine, CA to DFW
will be more than 10 minutes late from its quoted time.
P=(X>147)=
c. Compute the probability that its...
Delta airlines quotes a flight time of 2 hours, 5 minutes for its flight from Cincinnati...
Delta airlines quotes a flight time of 2 hours, 5 minutes for
its flight from Cincinnati to Tampa. Assume that the probability of
a flight time within any one-minute interval is the same as the
flight time within any other one-minute interval contained within
the larger interval, 120 and 140 minutes.
*State the objective: What is the probability
that the flight will be no more than 5 minutes late?
•Q1: What pdf best describes (models) the
situation or assigns probabilities...
A cell phone supplier claims that the operating time before failure of its devices (denoted X...
A cell phone supplier claims that the operating time
before failure of its devices (denoted X and expressed in years)
follows an exponential law of theta parameter. We know that 60% of
devices operate without failure for at least 2 years.
a) What is the average lifespan of the devices?
b) What is the time t such that 50% of the devices
operate less than t years?
c) If you have had a device from this manufacturer for 2 years,...
(Estimated time allowance: 40-50 minutes) Easy-Chair Corp. is considering replacing its existing equipment that is used...
(Estimated time allowance: 40-50 minutes)
Easy-Chair Corp. is considering replacing its existing equipment
that is used to produce comfort recline chairs. This existing
equipment was purchase 2 years ago at a base price of $100,000.
Installation costs at the time for this old equipment were $5,000.
The existing equipment is considered a 5-year class for MACRS. The
existing equipment can be sold today for $40,000 and for $0 in 3
years. The new equipment has a purchase price of $200,000...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- explain the difference between quantitative and qualitative research strategies. Provide an example of a crime based...
- use postorder and inorder tree traversals to make preorder traversal. #!/usr/bin/env python3 # encoding: UTF-8 """Turning...
- 1. Write an if-else statement to describe an object. Print "Balloon" if isBalloon is true and...
- An investor is considering purchasing a Treasury bond with a 20 year maturity, an 8% coupon...
- Write a program that copies the contents of one file to a destination file. This program...
- how to conduct a marketing mix for 3d crest white strips
- Is big data analytics used for service innovation at Amazon? If so, please write a brief...
ADVERTISEMENT