Numerade

Questions asked

BEST MATCH

If Spearman's coefficient of rank correlation is 0.75 for a sample of 15 observations, at .05 level of significance, can we conclude that its coefficient of rank correlation is positive? Question here: what is the decision rule of the test?

View Answer

BEST MATCH

6. Each of these passages contains one relative clause. For each relative clause, identify the gap in the relative clause. 1. His rescuers, good Samaritans that they were, took him to the doctor in Lizard. 2. He also compares the river and the sky to the sparrow that he brought home with him. 3. Yet there are very few individuals, let them be doing ever so well in the world, who are not always straining every nerve to do better. 4. I thought we were no longer in London, but in some horrible place where great beasts attacked us. 5. Crawley, whose car was stolen Dec. 29 in Manchester, asked Reno's for permission to see her car and take out any personal belongings still inside it. a. subject complement b. direct object c. determiner d. adverbial e. object of a preposition f. subject

View Answer

BEST MATCH

A woman is pushing a box of mass 12.0 kg to the left across a horizontal floor. The woman exerts a constant force of magnitude 50.0 N on the box directly to the left, as shown in the picture, and the box is moving to the left as she is pushing it. There is kinetic friction between the box and the floor, with $\mu_k = 0.240$. (a) Draw a free-body diagram of the box. Label all forces clearly. (b) Solve for the magnitude and direction of the acceleration of the box. Show your work.

View Answer

BEST MATCH

Given 198 and 222 as the lengths of two sides of a triangle, find the range of values for the third side.\ 24 < x < [?]\ Enter the number that belongs in the green box.

View Answer

BEST MATCH

Find the equation of the tangent plane to \newline $z = e^x + y + y^3 + 8$ \newline at the point $(0, 3, 39)$. \newline $z = $

View Answer

BEST MATCH

When the angle of (x) in a function and not x 4. \int \tan(\sin x)\cos(x)dx 5. \int \frac{30x^2}{\cos^2(2x^3)}dx 6. \int \sec^2(x)\sec(\tan x)dx U = _____ dU = ______ dx dU dx = _____ Sub: [ U = _____ dU = ______ dx dU dx = _____ Sub: [ U = _____ dU = ______ dx dU dx = _____ Sub: [ Expanded/Extended substitution 7. \int (x+3)^{11}(2x+1)dx Simplify with trig identities then integrate 8. \int \frac{\sqrt{1-\sin^2(x)}}{\csc^3(x)}dx

View Answer

BEST MATCH

1 (of 4). Let $Mat_{2 \times 2}(\mathbb{R})$ denote the vector space of $2 \times 2$ matrices with coefficients in $\mathbb{R}$. Consider the map $\phi: \mathbb{R}^3 \to Mat_{2 \times 2}(\mathbb{R})$ defined by $\phi: \begin{pmatrix} a \\ b \\ c \end{pmatrix} \mapsto \begin{pmatrix} a + 4b & 2b + c \\ 2c - a & -a - 4b \end{pmatrix}$ for any $a, b, c \in \mathbb{R}$. (a) (i) Show that $\phi$ is linear. (ii) Consider the alternative map $\tilde{\phi}: \mathbb{R}^3 \to Mat_{2 \times 2}(\mathbb{R})$ defined by $\tilde{\phi}: \begin{pmatrix} a \\ b \\ c \end{pmatrix} \mapsto \begin{pmatrix} a + 4 & 2 + c \\ 2c - a & -a - 4 \end{pmatrix}$. Is $\tilde{\phi}$ linear? Justify your answer fully. (b) Find a basis for $Ker(\phi) = \{x \in \mathbb{R}^3 | \phi(x) = 0\}$. (c) Calculate the rank of $\phi$, stating clearly any result that you use. (d) Find a basis for $Im(\phi) = \{\phi(x) \in Mat_{2 \times 2}(\mathbb{R}) | x \in \mathbb{R}^3\}$.

View Answer

BEST MATCH

c. Price of Zip's hamburgers will increase, quantity will decrease d. Price of Zip's hamburger will decrease, quantity will increase 2. Suppose the market for fish (a normal good) in the U.S. is in equilibrium. Then suppose that the cost of fuel (used in fishing boats) increases, while at the same time average household incomes in the U.S. increases. According to supply and demand principles, what will happen to the equilibrium price and quantity in the market for fish? a. Price and quantity will both increase b. Price and quantity will both decrease c. Price will decrease, quantity could increase or decrease d. Price will increase, quantity could increase or decrease 3. Suppose we are examining the market for bread in Moscow. An unusually good harvest causes the price of grain to decrease and the supply of bread increases dramatically. The immediate outcome we expect in the market is: a. A temporary shortage of bread b. A temporary surplus of bread c. The market achieves its new equilibrium d. A dystopian society develops in which bread is the new currency 4. Consider the situation described in question 3. After the supply shift due to the change in grain prices, how does the model of supply and demand predict buyers will eventually react? a. The demand curve will shift to the right b. The demand curve will shift to the left c. The demand curve remains the same, but the quantity demanded increases d. The demand curve remains the same, but the quantity demanded decreases 5. According to the information we examined regarding minimum wages in the U.S., which of the following statements is true?

View Answer

BEST MATCH

A glass window has a thickness of 8.30 mm (0.327 in). Using the "approximate" method, determine the transmission loss as a function of frequency in octaves over the range from 63 Hz to 8000 Hz. Present the results in a table and as a graph of TL vs. frequency (log scale). TABLE 4-1 Values of the Plateau Height (TLp) and Plateau Width (Î”f) for the Approximate Method of Calculation of the Transmission Loss for Panels Material TLp (dB) Î”f (octaves) fz/fi Aluminum 29 3.5 11 Brick 37 2.2 4.5 Concrete 38 2.2 4.5 Glass 27 3.3 10 Lead 56 2.0 4 Masonry block 30 2.7 6.5 Cinder 32 3.0 8 Dense Plywood 19 2.7 6.5 Sand plaster 30 3.0 8 Steel 40 3.5 11 Source: Watters (1959)

View Answer

BEST MATCH

Question Approximate the local minimum value of the function given below. Use Newton's method with the specified initial approximation $x_0$ to find $x_2$. Round your answer to the nearest thousandth. $\frac{3}{2}x^3 + \frac{3}{2}x^2 + 2x + 1$, $f(x) = - $x_0 = 2$ Provide your answer below: $x_2 \approx \square$

View Answer

andrew a.