(b) Find the minimum sample size needed, using a prior study that found that 28% of the respondents said they think Congress is doing a good or excellent job.

(c) Compare the results from parts (a) and (b).

Answer:

**The sample** size just be 752.

What is **confidence interval**?

A **confidence interval **(CI) for an unknown parameter in frequentist statistics is a range of estimations. The most popular **confidence level **is 95%, but other levels, such 90% or 99%, are occasionally used for computing confidence intervals. The fraction of related CIs over the long run that actually contain the **parameter's **true value is what is meant by the confidence level. The degree of confidence, sample size, and sample variability are all factors that might affect the width of the CI. A larger sample would result in a narrower confidence interval if all other factors remained constant. A wider **confidence **interval would also be required by a higher **confidence level **and would be produced by a sample with (1.645 / 0.03)2 * 0.5 * 0.5

=752

Sample size = 752

= 1 - 0.42 = 0.58

margin of error = E =3 % = 0.03

At 90% confidence level z

Hence, The sample size just be 752.

Learn more about **confidence interval**, by the following link.

#SPJ1

HELPPPPPPPP MEEEEEEE

9,13,43,55 what is the mean absolute deviate (MAD) of their ages

NEED HELP ASAP!!!!The steps below show the work of a student used to calculate the number of yards in 6,436 meters.(1 mile = 1,609 meters)(1 mile = 1,760 yards)Step 1: 6,436 meters multiplied by conversion factor 1 mile over 1,609 meters equals 4 milesStep 2: conversion factor of 1,760 yards over 1 mile divided by 4 miles equals 440 yardsStep 3: 440 yards(1 mile = 1,609 meters)(1 mile = 1,760 yards)How can the error in the student's work be corrected? (1 point)aThe 6,436 meters and the 1,609 meters in Step 1 should be switched.bThe 1 mile and the 1,609 meters in Step 1 should be switched.cThe conversion factor should be multiplied in Step 2 instead of being divided.dThe conversion factor should be added in Step 2 instead of being divided.

(1 point) For the given position vectors r(t)r(t), compute the (tangent) velocity vector r′(t)r′(t) for the given value of tt . A) Let r(t)=(cos4t,sin4t)Let r(t)=(cos4t,sin4t). Then r′(π4)r′(π4)= ( , )? B) Let r(t)=(t2,t3)Let r(t)=(t2,t3). Then r′(5)r′(5)= ( , )? C) Let r(t)=e4ti+e−5tj+tkLet r(t)=e4ti+e−5tj+tk. Then r′(−5)r′(−5)= i+i+ j+j+ kk ?

Which is the best way to describe 1-2 ?-3-2-10123point Athe distance between A and Dthe opposite of 2the distance between A and C

9,13,43,55 what is the mean absolute deviate (MAD) of their ages

NEED HELP ASAP!!!!The steps below show the work of a student used to calculate the number of yards in 6,436 meters.(1 mile = 1,609 meters)(1 mile = 1,760 yards)Step 1: 6,436 meters multiplied by conversion factor 1 mile over 1,609 meters equals 4 milesStep 2: conversion factor of 1,760 yards over 1 mile divided by 4 miles equals 440 yardsStep 3: 440 yards(1 mile = 1,609 meters)(1 mile = 1,760 yards)How can the error in the student's work be corrected? (1 point)aThe 6,436 meters and the 1,609 meters in Step 1 should be switched.bThe 1 mile and the 1,609 meters in Step 1 should be switched.cThe conversion factor should be multiplied in Step 2 instead of being divided.dThe conversion factor should be added in Step 2 instead of being divided.

(1 point) For the given position vectors r(t)r(t), compute the (tangent) velocity vector r′(t)r′(t) for the given value of tt . A) Let r(t)=(cos4t,sin4t)Let r(t)=(cos4t,sin4t). Then r′(π4)r′(π4)= ( , )? B) Let r(t)=(t2,t3)Let r(t)=(t2,t3). Then r′(5)r′(5)= ( , )? C) Let r(t)=e4ti+e−5tj+tkLet r(t)=e4ti+e−5tj+tk. Then r′(−5)r′(−5)= i+i+ j+j+ kk ?

Which is the best way to describe 1-2 ?-3-2-10123point Athe distance between A and Dthe opposite of 2the distance between A and C

h=2A/b

Hope this helps!

Hope this helps!

What is the total?

What is the percent?

What is the answer?

**Answer:**

80 percent of 16 is 12.8 I'm sorry but that's all I know

**Answer:**

**Step-by-step explanation:**

Luis has 30 problems and after one hour, of those problems are left. This means that the total number of problems left will be .

**Multiplying by a fraction is the same as dividing by a whole**. The denominator of is 6, so we can divide 30 by 6.

Hope this helped!

**Answer: 25**

**Step-by-step explanation: 1/6 of 30 is 5, so 30 minus 5 equals 25.**

12. (-2, -1) and (8, -3)

**Answer:**

11) 4/11

12) -0.2

**Step-by-step explanation:**

The **standard form **of the *quadratic function* whose graph is a **parabola **with the given **vertex** and that passes through the **given point is;**

*y = x² + 6x + 13*

We are given;

Vertex coordinate; (-3, 4)

A point on the graph; (0, 13)

The **vertex form **of a quadratic equation is given by;

**y = a(x - h)² + k**

Where h, k are the coordinates of the vertex.

a is the letter in **general form of quadratic equation **which is;

**y = ax² + bx + c**

Thus, at point (0, 13) at the vertex of (-3, 4), we have;

13 = a(0 - (-3))² + 4

⇒ 13 - 4 = 9a

9a = 9

a = 9/9

**a = 1**

Since y = a(x - h)² + k is the vertex form, let us put the vertex values for h and k as well as the value of a to get the quadratic equation;

y = 1(x - (-3))² + 4

y = x² + 6x + 9 + 4

**y = x² + 6x + 13**

Read more at; brainly.com/question/17546421

**Answer:**

The formula for this quadratic function is x*2 +6x+13

**Step-by-step explanation:**

If we have the vertex and one point of a parabola it is possible to find the quadratic function by the use of this

y= a (x-h)*2 + K

Quadratic function looks like this

y= ax*2 + bx + c

So let's find the a

y= a (x-h)*2 + K where

y is 13, x is 0, h is -3 and K is 4

13= a (0-(-3))*2 +4

13=9a +4

9=9a

9/9=a

1=a

The quadratic function will be

y= 1(x+3)*2 + 4

Let's get the classic form

(x+3)*2 = (x+3)(x+3)

(x*2+3x+3x+9)

x*2 +6x+13

f(0) = 13

Answer:

The number is

Step-by-step explanation:

From the question we are told that

The sample size is n = 800

The number of seniors is S = 519

The number of commuters is C = 430

The number of of seniors that are commuters is

Generally the number of 800 surveyed students who were seniors or were commuters is mathematically evaluated as

=>

=>