Using data for the years 2005 to 2019 for US, an economist obtained the following demand function for automobiles: Q.4.1 Y₁ 5266 + 0.857 X₁ se = (0.02 ) (0.561) Y= retail sales of passenger cars (thousands) and X = the real disposable income (billions of 2017 rand) Q.4.2 Construct a 90% confidence interval for B (xt). R² = 0.26 Test the following hypothesis at 5% level using a t-test: H: B=0 H: B 0

Q: (-14) + (–7)

A:

Q: factors of 24 that add up to 10

A: factors of 24 that add up to 10

Q: b. N(0)

A: Given,  r→t=sint, t, cost                   ...1

Q: a3-16a

A: a³−16a ⇒a(a²−16) ⇒a(a² −4²) ⇒a(a+4)(a−4)

Q: 5(18)

A: To find5(18)

Q: Find lim (x,y)→(12,3) xy cos(x – 4y). OS 1. –36 2. 36 3. 3 4. 0

A:

Q: 619 d. 4 10

A:

Q: 3. Find L-¹{√534}. (s+3)

A:

Q: 18(9+7)+3

A: 18(9+7)+3

Q: 6. 4 Z+ 1 z+ 7 2.

A: Given,  4/(z + 1)  =  2/(z + 7)  To find value of z.

Q: 6. 8.

A: Pythagorean Theorem:                  Pythagoras theorem states that  "In right angled triangle ,…

Q: 8(14-9)+5 32+6

A: The given expression is

Q: k 24

A: First we solve the inequality. ANd for that , we divide both sides by -6 .And on dividing by…