Question
In: Statistics and Probability
The piston diameter of a certain hand pump is 0.7 inch. The manager determines that the...
The piston diameter of a certain hand pump is 0.7 inch. The
manager determines that the diameters are normally distributed,
with a mean of 0.7 inch and a standard deviation of 0.005 inch.
After recalibrating the production machine, the manager randomly
selects 21 pistons and determines that the standard deviation is
0.0044 inch. Is there significant evidence for the manager to
conclude that the standard deviation has decreased at the a=0.10
level of significance?
What are the correct hypothesis is H0:_,_,__
The alternative hypothesis is H1: _,_,__
Calculate the value of the test statistic.
X2/0= _ (Round two
decimal)
Use technology to determine the P-value of the test
statistic.
The P-value is_. (Round three decimal places)
What is the correct conclusion at the a=0.10 level of
significance?
Since the P-value is ___ than the level of significance, ___ the
null hypothesis. There ___ sufficient evidence to conclude that the
standard deviation has decreased at the 0.10 level of
significance.
Solutions
orchestra answered 2 years agoRelated Solutions
The piston diameter of a certain hand pump is 0.7 inch. The manager determines that the...
The piston diameter of a certain hand pump is 0.7 inch. The
manager determines that the diameters are normally distributed,
with a mean of 0.7 inch and a standard deviation of 0.005 inch.
After recalibrating the production machine, the manager randomly
selects 21 pistons and determines that the standard deviation is
0.0044 inch. Is there significant evidence for the manager to
conclude that the standard deviation has decreased at the a=0.10
level of significance?
What are the correct hypothesis is...
A hand-driven tire pump has a 2.00 cm diameter piston and a maximum stroke of 32.0...
A hand-driven tire pump has a 2.00 cm diameter piston and a
maximum stroke of 32.0 cm.
(a) How much work do you do in one stroke if the average gauge
pressure is 2.40 ✕ 105 N/m2 (about 35 psi)?
(You may consider this an isothermal process.)
J
(b) What average force do you exert on the piston, neglecting
friction and gravity?
N
A 32 inch diameter pump handling 22000 GPM flow of water coming from an atmospheric tank...
A 32 inch diameter pump handling 22000 GPM flow of water coming
from an atmospheric tank storage is running at 1170 rpm. The water
temperature can be taken at 25 C. The suction line is 20 meter long
at 6 inch diameter. The pump suction is 0.4 meter above ground
level. The tank storage is elevated on a 1 meter high platform.
Assume friction factor of 0.02. Specific Gravity of water at 25 C
is 0.9967. NPSH required is 34...
A solid cylinder of 6 inch diameter and 4 inch high is compressed axisymmetrically to 2...
A solid cylinder of 6 inch diameter and 4 inch high is
compressed axisymmetrically to 2 inch high.
a) Calculate the final diameter of the product, the three
orthogonal strains and the Von Mises strain.
b) Estimate the maximum total force required for this operation.
Assume: coefficient of fricition 0.2; Use Ludwik's Law to find the
pressure at maximum axial strain; the strength coefficient of the
workpiece: K is 147 ksi, strain hardening exponent is 0.17.
Please answer the question: A 24 inch diameter spirally reinforced concrete column with a 1.5 inch...
Please answer the question:
A 24 inch diameter spirally reinforced concrete column with a
1.5 inch cover to the spiral is reinforced with Grade 60 bars and
has a concrete compressive strength of 5,000 psi. Determine the
required diameter and pitch of the spiral reinforcement.
An engineer is conducted the centrifugal pump at aircraft hangar. The pump has an eye diameter...
An engineer is conducted the centrifugal pump at aircraft
hangar. The pump has an eye diameter and an impeller diameter of
200 mm and 500 mm respectively while running at 900 rpm. While it
rotate, the blade angle is measured at 35o at outlet
with considering the tangent. The flow velocity is limited at 3 m/s
constantly. Evaluate the
(a) inlet blade angle
(b) outlet absolute velocity with its angle at outlet and
(c) the manometric head.
A centrifugal pump has an eye diameter and an impeller diameter of 300 mm and 600...
A centrifugal pump has an eye diameter and an impeller diameter
of 300 mm and 600 mm respectively while running at 850 rpm. When
rotating, the blade angle is measured at 35o at the
outlet with considering the tangent. The flow velocity is limited
at 5 m/s constantly. Determine the following;
(a) inlet blade angle
(b) outlet absolute velocity with its angle at outlet and
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1. The impeller in a centrifugal pump has inner diameter as 125 mm and outer diameter...
1. The impeller in a centrifugal pump has inner diameter as
125 mm and outer diameter as 270 mm. The pump runs at 1400 rpm. The
vane angles of impeller at inlet and outlet are 17° and 30°
respectively. The water enters the impeller radially and velocity
of flow is constant. Determine the work done by impeller per unit
weight of water.
1. One hydraulic press has a 2.0 cm diameter piston and another piston has a 8.0...
1.
One hydraulic press has a 2.0 cm diameter piston and another piston
has a 8.0 cm diameter. What force must be applied to the smallest
piston to balance a force of 1600 N to the largest piston?
a. 6.25 N
b. 23 N
c. 400N
d. none of the above
2. A barrel contains an oil layer of 0.120 m over 0.250 m of
water. The oil density is 600 kg / m³. The gauge pressure at the
oil-water...
We have a cylinder and piston similar to the one in the figure. The diameter of...
We have a cylinder and piston similar to the one in the figure.
The diameter of the piston is 3.50 cm. The distance from the bottom
of the cylinder to the piston is 12.6 cm. The cylinder is filled
with an ideal diatomic gas at room temperature (23.8∘C23.8∘C) and
room pressure (1.00 atm).
(a)
If we push down on the piston with a force equal to 119 lb, how
far can we move the piston? Consider the compression to be...
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