Numerade

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A university president was interested to know if the university community had the same pet ownership as a national survey. He knows from survey data that the breakdown of the nation is 60% own dogs, 35% own cats, and 5% responded with “Other”. He sent out a university wide survey and obtained 1425 total responses. Of those who responded, 715 identified themselves as a dog owner, 597 as a cat owner, and 113 as owning something else. Test the hypothesis that the percentages of pet ownership at the university are the same as those in the national survey (α = .05).

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You are given the following 3 x 3, (X'X) Inverse matrix 1.20 -0.40 -0.08 -0.40 0.50 0.15 -0.08 0.15 0.16 And told that the SEE of the regression is 0.75 and the slope of the first explanatory variable is 2.0 and the slope of the second explanatory variable is 1.5. What is the standard error of the slope of the second explanatory variable? Type in your answer as a decimal, rounded it off to 4 decimal places. The answer is not .5303

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Two ropes hold a crate as shown below. The tension in one is 546 N in a direction of 27° with the horizontal, and the other has a tension of 773 N in a direction of 51° with the horizontal. How much does the crate weigh? 27° 51° 546 N 773 N The crate weighs $\boxed{}$ N

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+Z 160 N 35° 30° 250 N Find the resultant force vector of the three forces shown. Note that the 310 N force is in the y-z plane and the 160 N force is in the x-z plane. Show the resultant force using cartesian vector notation. +x 5 +Y 310 N

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Calculate the amount of water that must be added to each of the following substances to produce the indicated solution. 7.20 g of urea (NH 2 ) 2 ^ 6 CO in the preparation of a 18.8 percent by mass solution

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Total revenue minus accounting cost equals _____ , which will always be the greater than the ______. Fill in the blanks.

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Use the information in figure below to answer * questions 4, 5, 6 Question 4: Calculate the electric current passing through the 7.00 ? resistor 5 ? 7? +5V (a) +20V +4V 15 ? A. 6 A B. 3 A C. 4 A D. 1 A E. 2 A W (b) Question 5: Calculate the potential difference Va - Vb A. -15 V B. 8 V C. 24 V D. 15 V E. 6 V *

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Exercise 21.127 - HW Part A A charged line extends from y = 2.50 cm to y = -2.50cm. The total charge distributed uniformly along the line is -7.50 nC (Figure 1) Find the magnitude of the electric field on the z-axis at z = 10.0cm. Give the answer in three significant figures. $|\vec{E}_z| =$ N/C Submit Request Answer Part B Find the magnitude of the electric field on the y-axis at z = 10.0cm. $|\vec{E}_y| =$ N/C Submit Request Answer Figure < Return to Assignment Provide Feedback

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Example Problem 2.36 (Beer and Johnston) B 75° Two cables are tied together at C and loaded as shown. Determine the tension in AC and BC. G A 75° C 200 kg 17

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PROBLEM 3 (25 Points): In the mechanism shown the link lengths are $r_1 = 11$ cm, $r_2 = 3$ cm, $r_3 = 13$ cm, $r_4 = 6$ cm, and the joint variables are $\theta_{12}$, $\theta_{12}$ and $\theta_{14}$. $\theta_{12}$ is the input variable. The loop closure equation is $\overrightarrow{AB} + \overrightarrow{BC} = \overrightarrow{AD} + \overrightarrow{DC}$ Using analytical solution of the loop closure equation find $\theta_{12}$ and $\theta_{14}$ when $\theta_{12} = 80^\circ$. Find all solutions corresponding to different assembly configurations of the mechanism. Hint: First find $\theta_{14}$ by eliminating $\theta_{12}$. $\theta_{12}$ $\theta_{14}$ $\theta_{13}$ $80^\circ$ $80^\circ$

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