The burning rates of two different solid-fuel propellants used in aircrew escape systems are being studied....
The burning rates of two different solid-fuel propellants used in aircrew escape systems are being studied. It is known that both propellants have approximately the same standard deviation of burning rate; that is, = = 3cm/s. Two random samples of = 20 and = 20 specimens are tested; the sample mean burning rates are = 18.02cm/s and = 24.37cm/s. Test the hypothesis that both propellants have the same mean burning rate. Use a fixed level test with α= 0.05. To gain full credit, you should show all work.
I.(a) State the modeling assumptions.
(b) Define the parameter of interest.
(c) State the hypotheses.
(d) Calculate the value of the test statistic. What is the distribution of the test statistic.
(e) Find the p-value using the appropriate table.
(f) State the decision and the conclusion in the context of the problem.
II. Calculate a 95% confidence on the difference in means and
interpret your interval in the context of this problem.
Homework Answers
Add Answer to:
The burning rates of two different solid-fuel propellants used
in aircrew escape systems are being studied....
The burning rates of two different solid-fuel propellants used in aircrew escape systems are being studied....
The burning rates of two different solid-fuel propellants used in aircrew escape systems are being studied. It is known that both propellants have the same standard deviation of burning rate; σ1 = σ2 = 3 centimetres per second. Two random samples of n1 = n2 = 20 are tested; the sample mean burning rates are 8 and 24 centimetres per second respectively. Construct a 95% upper bound on the difference in means μ1 − μ2. Please report your answer in...
1 pts Question 9 The burning rates of two different solid-fuel propellants used in air crew...
1 pts Question 9 The burning rates of two different solid-fuel propellants used in air crew escape systems are being studied. It is known that both propellants have approximately the same standard deviation of burning rate, with a value of 3 cm/s. Two random samples of size 20 each are tested; the sample means are recorded as 18 and 24 cm/s. What type of hypothesis tests would be most appropriate if we wanted to test the hypothesis that both propellants...
The burning rates of two fuel propellants, types A and B, are studied. It is assumed...
The burning rates of two fuel propellants, types A and B, are studied. It is assumed that the burning rates for the two propellants are normal, with standard deviations A = 1.08 cm/sec, and OB = 9.85 cm/sec. A random sample of 350 specimens of propellant A, and a random sample of 380 specimens of propellant B are taken. Assuming that ha= 5.3 cm/sec and JB = 4.2 cm/sec, find the probability that the difference of the sample means XA...
The combustion rate of two solid propellants that are used in exhaust systems is studied emergency...
The combustion rate of two solid propellants that are used in exhaust systems is studied emergency of airplanes. It is known that the combustion rate of the two propellants is distributed normally with standard deviations σ1 = 3 cm / s and σ2 = 2.9 cm / s. Two samples are tested size 20 random samples, one for each propellant, and the resulting sample means for the rate of combustion are: x̅̅1̅ = 18 cm / s and x̅̅2̅ =...
An oil additive for automobiles claims that it increases fuel mileage by at least a mean...
An oil additive for automobiles claims that it increases fuel mileage by at least a mean of 2.3 mpgwith a standard deviation of .5 mpg. A group of AP Statistics students decide to test this claim. They randomly select 49 people to test the oil additive and found that drivers using the additive increased their fuel mileage by a mean of 2.1 mpg, with a standard deviation of .5. Is this sufficient evidence to reject the null hypothesis in favor...
2. (25pts) Two different brands of latex (water-based) paint are being considered for use in a large construction project. To choose between the brands, one of the key factors is the time it takes th...
2. (25pts) Two different brands of latex (water-based) paint are being considered for use in a large construction project. To choose between the brands, one of the key factors is the time it takes the paint to dry. Engineers sampled 22 specimens of each brand and measured the drying times (in hours) of each specimen. The data collected are given in Table 1 below Specimen Brand A Brand B Specin Brand A Brand B 3.5 2.7 3.9 4.2 4.6 2.7...
Two different analytical tests can be used to determine the level of impurity of steel alloys....
Two different analytical tests can be used to determine the
level of impurity of steel alloys. Eight specimens are tested using
both procedures and the results are shown in the following
tabulation:
Specimen
Test1
Test 2
1
1.2
1.4
2
1.3
1.7
3
1.5
1.5
4
1.4
1.3
5
1.7
2.0
6
1.8
2.1
7
1.4
1.7
8
1.3
1.6
Two different analytical tests can be used to determine the level of impurity of steel alloys. Eight specimens are tested...
Question 14 Two different formulas of an oxygenated motor fuel are being tested to study their...
Question 14 Two different formulas of an oxygenated motor fuel are being tested to study their road octane numbers. The variance of road octane number for formula 1 is o 1.5 1L.S, and for formula 2 it is 1 o5 = 12. normality (a) Test the hypotheses Ho: μ-μ2 versus H1:HI < μ2 using α Two random samples of size n 1 = 15 and r2-20 are tested, and the mean octane numbers observed are X1 888 fluid ounces and...
The detection temperature under load for two different types of plastic pipe is being investigated. Two...
The detection temperature under load for two different types of plastic pipe is being investigated. Two random samples of 15 pipe specimens are tested, and the detection temperatures observed are as follows (in °F): Type 1: 206, 188, 205, 187, 194, 193, 207, 185, 189, 213, 192, 210, 194, 178, 205 Type 2: 177, 197, 206, 201, 180, 176, 185, 200, 197, 192, 198, 188, 189, 203, 192 Do the data support the claim that the deflection temperature under load...
AS11ER2 AD3E62E60465... Reliance on solid biomass fuel for cooking and heating exposes many children from developi...
AS11ER2 AD3E62E60465... Reliance on solid biomass fuel for cooking and heating exposes many children from developing countries to high levels of indoor air pollution. An article presented information on various pulmonary characteristics in samples of children whose households in India used either biomass fuel or liquefied petroleum gas (LPG). For the 754 children in biomass households, the sample mean peak expiratory flow (a person's maadimum speed of expiration) was 3.8 US, and the sample standard deviation was 1.2. For the...
1 pts Question 9 The burning rates of two different solid-fuel propellants used in air crew escape systems are being studied. It is known that both propellants have approximately the same standard deviation of burning rate, with a value of 3 cm/s. Two random samples of size 20 each are tested; the sample means are recorded as 18 and 24 cm/s. What type of hypothesis tests would be most appropriate if we wanted to test the hypothesis that both propellants...
The burning rates of two fuel propellants, types A and B, are studied. It is assumed that the burning rates for the two propellants are normal, with standard deviations A = 1.08 cm/sec, and OB = 9.85 cm/sec. A random sample of 350 specimens of propellant A, and a random sample of 380 specimens of propellant B are taken. Assuming that ha= 5.3 cm/sec and JB = 4.2 cm/sec, find the probability that the difference of the sample means XA...
2. (25pts) Two different brands of latex (water-based) paint are being considered for use in a large construction project. To choose between the brands, one of the key factors is the time it takes the paint to dry. Engineers sampled 22 specimens of each brand and measured the drying times (in hours) of each specimen. The data collected are given in Table 1 below Specimen Brand A Brand B Specin Brand A Brand B 3.5 2.7 3.9 4.2 4.6 2.7...
Two different analytical tests can be used to determine the
level of impurity of steel alloys. Eight specimens are tested using
both procedures and the results are shown in the following
tabulation:
Specimen
Test1
Test 2
1
1.2
1.4
2
1.3
1.7
3
1.5
1.5
4
1.4
1.3
5
1.7
2.0
6
1.8
2.1
7
1.4
1.7
8
1.3
1.6
Two different analytical tests can be used to determine the level of impurity of steel alloys. Eight specimens are tested...
Question 14 Two different formulas of an oxygenated motor fuel are being tested to study their road octane numbers. The variance of road octane number for formula 1 is o 1.5 1L.S, and for formula 2 it is 1 o5 = 12. normality (a) Test the hypotheses Ho: μ-μ2 versus H1:HI < μ2 using α Two random samples of size n 1 = 15 and r2-20 are tested, and the mean octane numbers observed are X1 888 fluid ounces and...
AS11ER2 AD3E62E60465... Reliance on solid biomass fuel for cooking and heating exposes many children from developing countries to high levels of indoor air pollution. An article presented information on various pulmonary characteristics in samples of children whose households in India used either biomass fuel or liquefied petroleum gas (LPG). For the 754 children in biomass households, the sample mean peak expiratory flow (a person's maadimum speed of expiration) was 3.8 US, and the sample standard deviation was 1.2. For the...
Most questions answered within 3 hours.
-
A .15kg rubber ball is bounced off a wall. Before hitting the
wall, the ball moves...
asked 10 minutes ago -
A manufacturing company preparing to build a new plant is
considering three potential locations for it....
asked 12 minutes ago -
B. If compound Y has approximately the same values of solubility
in toluene as compound X,...
asked 58 minutes ago -
Oscar Inc. has inventory in Japan valued at 39,051,000 Yen one
year ago. One year ago...
asked 1 hour ago -
If Canada suffered from "fundamental disequilibrium," and its
government choose not to devalue its currency, a...
asked 1 hour ago -
4. How many input & output Key Value Pairs are passed into,
and emitted out of...
asked 1 hour ago -
Why would your heart not function well if constructed of
skeletal muscle? What is the particular...
asked 1 hour ago -
Please respond to this essay question in full essay form for
Chemistry 1102 Organic and Biochemistry:...
asked 1 hour ago -
Determine the head loss and velocity of flow in a water supply main
of 15.0 cm...
asked 1 hour ago -
A marketing executive who knowingly authorizes a shoddy
defective product to be brought to market is...
asked 1 hour ago -
Write a psudocode:
1. Define a function called authorize that takes in 2 strings,
uName, and...
asked 1 hour ago -
What Hall voltage (in mV) is produced by a 0.180 T field applied
across a 2.60...
asked 1 hour ago