Question
In: Statistics and Probability
The canoe team from the previous problem wishes to prove that their compressive strength of 900...
The canoe team from the previous problem wishes to prove that their compressive strength of 900 psi is indeed greater than the required 860 psi. To do so, they write out a number of hypotheses:
A: Our concrete is stronger than required, μ > 860
B: Our compressive strength is great, μ = 900
C: Our concrete meets the requirement, μ = 860
D: Typical concrete is weaker than ours, μ < 900
Of these four potential hypotheses which should be the null hypothesis?
Which of the hypotheses presented in the previous problem should be the alternative hypothesis?
Solutions
orchestra answered 2 years agoRelated Solutions
Strength of concrete: The compressive strength, in kilopascals, was measured for concrete blocks from five different...
Strength of concrete: The compressive strength, in kilopascals,
was measured for concrete blocks from five different batches of
concrete, both three and six after pouring. The data are as
follows. Can you conclude that the mean strength after three days
is less than the mean strength after six days? Let U1 represent the
mean strength after three days and ud=u1-u2, Use the a=0.01 level
and the critical value method with the table.
1. State the appropriate null and alternate hypotheses....
Strength of concrete: The compressive strength, in kilopascals, was measure for concrete blocks from five different...
Strength of concrete: The compressive strength, in kilopascals,
was measure for concrete blocks from five different batches of
concrete, both three and six days after pouring. The data are as
follows:
Block
1
2
3
4
5
After 3 days
1341
1316
1352
1355
1327
After 6 days
1376
1373
1366
1384
1358
Can you conclude that the mean
strength after three days differs from the mean strength after six
days? Use the α = 0.05 level of significance.
State...
Let X be a random variable representing the compressive strength of concrete cubes from a particular...
Let X be a random variable representing the compressive strength
of concrete cubes from a particular mix. X has a normal
distribution with mean and standard deviation 60.14 and 5.02 N/mm2,
respectively.
a. The probability that the compressive strength of a cube is
between its mean value and c is
0.30. In other words P(μ £ X £ c) = 0.30, where μ is the mean value
given above. What is
the value of c?
b. Assume that each cube...
in table 1 the failure load obtained from the compressive strength test at the laboratory are presented....
in table 1 the failure load obtained from the compressive
strength test at the laboratory are presented. sate
whether those values are satisfactory according to TS EN206 1;2004
or not verify your results. concrete class C35. Determine also
standard deviation and variance
Table 1 Failure load for 200 mm cubic samples
NO
FAILURE LOAD (KN)
1
1645
2
1646
3
1641
4
1641
5
1641
PLEASE CAN YOU SLOVE IT STEP BY STEP
How does the toughness of road aggregates differ from their compressive strength? Can you write a...
How does the toughness of road aggregates differ from their
compressive strength? Can you write a mathematical relationship, if
any?
A test group of the class used an old aggregate impact test
machine. The weight of the hammer was about 1 kgf lower than the
standard weight. Determine the percentage error in the impact value
of the aggregate.
Should a poor quality road aggregate give a low impact value?
Justify your answer.
Question: Using the data obtained from the uniaxial compressive strength test given below: a. Find the...
Question: Using the data obtained from the
uniaxial compressive strength test given below:
a. Find the average uniaxial compressive
strength (UCS) and standard deviation.
b. Make UCS classification (ISRM, 1978).
Specimen
Diameter (mm)
Specimen
Height (mm)
Failure Load
(kN)
54,0
140
252,5
53,2
135
275,5
53,7
140
232,5
53,5
130
225,5
53,1
135
217,5
53,2
140
225,5
Prove that the field strength inside the Faraday cylinder far from its ends is zero. ??
Prove that the field strength inside the Faraday cylinder far from
its ends is zero. ??
This problem is a complex financial problem that requires several skills, perhaps some from previous sections....
This problem is a complex financial problem that requires
several skills, perhaps some from previous sections.
Clark and Lana take a 30-year home mortgage of $128,000 at 7.4%,
compounded monthly. They make their regular monthly payments for 5
years, then decide to pay $1400 per month.
(a) Find their regular monthly payment. (Round your answer to
the nearest cent.)
$
(b) Find the unpaid balance when they begin paying the $1400.
(Round your answer to the nearest cent.)
$
(c)...
This problem is a complex financial problem that requires several skills, perhaps some from previous sections....
This problem is a complex financial problem that requires
several skills, perhaps some from previous sections. Clark and Lana
take a 30-year home mortgage of $127,000 at 7.1%, compounded
monthly. They make their regular monthly payments for 5 years, then
decide to pay $1100 per month. (a) Find their regular monthly
payment. (Round your answer to the nearest cent.) $ (b) Find the
unpaid balance when they begin paying the $1100. (Round your answer
to the nearest cent.) $ (c)...
This problem is a complex financial problem that requires several skills, perhaps some from previous sections....
This problem is a complex financial problem that requires
several skills, perhaps some from previous sections. Clark and Lana
take a 30-year home mortgage of $128,000 at 7.5%, compounded
monthly. They make their regular monthly payments for 5 years, then
decide to pay $1400 per month. (a) Find their regular monthly
payment. (Round your answer to the nearest cent.) $ (b) Find the
unpaid balance when they begin paying the $1400. (Round your answer
to the nearest cent.) $ (c)...
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