SE DEBE CONTRUIR UNA PARED QUE TENDRÁ 4 METROS DE LARGO POR 3 METROS

On the first statistics exam, the coefficient of determination between the hours studied and the grade earned was 80%. The stand

True [87]

Answer:

$\left[\begin{array}{ccccc}&DF&SS&MS&F\\Regression&1&7200&7200&72\\Error&18&1800&100\\total&19&900\end{array}\right]$

Explanation:

Sample size, n=20

Degrees of freedom is 1

Number of degrees of freedom for error is n-2 hence 20-2=18

Total number of degrees of freedom is 18+1=19

Standard error estimate is $s_{y-x}=\sqrt {\frac {SSE}{n-2}}$

Here, $SSE=(n-2)s_{y-x}^{2}=(20-2)(10)^{2}=1800$

Coefficient of determination $r^{2}=\frac {SSE}{SS total}$

Here, $SSR=r^{2}(SSR+SSE)$

$SSR=\frac {r^{2}}{1-r^{2}} SSE=\frac {0.8}{1-0.8}(1800)=7200$

The total sum of squares is

SS total=SSR+SSE=7200+1800=9000

MSR=SSR=7200

$MSE=\frac {SSE}{n-2}=\frac {1800}{20-2}=100$

F value is given by

$F=\frac {MSR}{MSE}=\frac {7200}{100}=100$

The ANOVA table is then

$\left[\begin{array}{ccccc}&DF&SS&MS&F\\Regression&1&7200&7200&72\\Error&18&1800&100\\total&19&900\end{array}\right]$

4 0

4 years ago

Using an "AND" and an "OR", list all information (Equipment Number, Equipment Type, Seat Capacity, Fuel Capacity, and Miles per

Tomtit [17]

Answer:

Explanation :

The given information to be listed can are Equipment Number, Equipment Type, Seat Capacity, Fuel Capacity, and Miles per Gallon.

Check the attached document for the solution.

5 0

3 years ago

A helicopter moves horizontally in the x direction at a speed of 120 mi/h. Knowing that the main blades rotate clockwise when vi

devlian [24]

Answer:

The instantaneous axis of rotation=

x = 0 ; z = 8.4 ft

Explanation:

Given:

Speed of helicopter, Vo= 120 mi/h, converting to ft/sec, we have:

$\frac{5280 * 120}{60*60}$

= 176 ft/s

Angular velociyy, w = 220 rpm, converting to rad/sec, we have: $\frac{200*2*pi}{60} =20.95 rad/s$

The helicopter moves horizontally in the x direction at a speed of 120 mi/h, this means that the helicopter moves in the positive x direction at 120mi/h

To find the instantaneous axis of rotation of the main blades, we have:

Where Vc = 20.95 rad/s

Vo = 176 ft/s

$z = \frac{V_0}{V_c} = \frac{176ft/s}{20.95rad/s}$

= 8.4 ft

Therefore the axis of rotation=

x = 0 ; z = 8.4 ft

4 0

3 years ago

The Reynolds number for flow over a fixed horizontal flat plate is constant throughout its length. a) True b) False

ANTONII [103]

Answer: False

Explanation: Reynolds number is the number for determining he flow pattern of the behavior of fluids.It judges the flow of the fluid ans states whether it is of turbulent or laminar natured. This number has the property of kinematics as well as statics. It can also be defined as the ratio between the inertial force to viscous force.It's length changes along with change length of the horizontal plate .Thus, the statement given is false.

5 0

4 years ago

Which is the most effective way to reduce discrimination at the workplace? A. Appoint employees of a single race or religion. B.

sveticcg [70]

Answer:

C is the correct answer coz the others don't make sense

6 0

2 years ago

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