Mathematics College

5. Past experience shows that the standard deviation of the distances traveled by consumers to patronize Chinese restaurants is 2 km. How large a sample is needed to estimate the population mean distance traveled to within 0.4 km

Answers

Answer 1

Answer:

96

Step-by-step explanation:

Given that :

Standard deviation (s) = 2km

Error in estimation is within 0.4 km ; Error (E) = 0.4 km

Using the relation :

Sample size = ((Zα/2 * s) /E)^2

Using α = 0.05

The Zcritical at 0.05 = Z0.025 = 1.96

Sample size = ((1.96 * 2) / 0.4)^2

Sample size = (3.92 / 0.4)^2

Sample size = 9.8²

Sample size = 96.04

Required sample size = 96

Related Questions

What is the equation of the line through (2, -4) and (0, 4)?
OA. y= 4x- 4
O B. y= -4x- 4
Oc. y= -4x+ 4
OD.y= 4x+ 4

Answers

Answer: C

m = slope

m = (y2 - y1) / (x2 - x1)

2 points:
(2, -4) x1 = 2 and y1 = -4
(0, 4) x2 = 0 and y2 = 4

m = (4 - (-4)) / (0- 2)

m = 8 / -2

m = -4

Equation of the line is : y = mx + b

So we got...

y = -4x + b

Then we can use any of the two points given to solve for b. I’m going to use (0, 4).

y = -4x + b

4 = -4(0) + b

4 = 0 + b

4 = b

Therefore the equation of the line is
y = -4x + 4

7 ft and 13 ft whats the third side length

Answers

the answer is 6 < c < 20

Solve the equation for y.
yk+yv=r
y=?

Answers

Answer:

y = r / (k+v)

Step-by-step explanation:

First, you use the distributive property and take out y: y(k+v)=r

Then you divide both sides by (k+v): y(k+v)/(k+v) = r/(k+v)

Finally you get y = r / (k+v)

Find the 53rd term of the following arithmetic sequence.

3, 12, 21, 30, ...

Answers

Answer:

471

Step-by-step explanation:

using the equation 9n-6 and replacing the n with 53 you would get 471.

What is the y intercept of y =4x

Answers

Answer:

origin of the graph (0)

Step-by-step explanation:

because it does not have a b value it is zero if there is no plus or minus a number at the end it is always 0 when dealing with the y=mx+b equation

PLS HELP. It’s question 18

Answers

Answer:

no

Step-by-step explanation:

No because figure b is much bigger and has a steeper angle at the top

What is the solution to this fraction problem


Answers

Answer:

ABCD

Step-by-step explanation:

so first you use glue and then paint and then contact solution

Determine whether the mapping diagram shown below represents a
function
27 points

Answers

Answer:

Not a Function

Step-by-step explanation:

Each y-value has 2 x-values. It is supposed to only have one. hope this helped you!! Give brainliest

can anyone help me find the answers please !!

Answers

Slope: -3/2
Y-int: 4
Slope intercept form: y= -3/2x + 4
Slope= 3/-2 Y-Intercept= 4 Slope-Intercept form= y= 3/-2 +4

Find the missing length. The triangles in each pair are similar.

Answers

Answer:

I think its 60 and if not then 64.If not then I have no i d e a

In triangle ABC, what is the measure of angle C if A = 60°, a = 9, and c = 5?

Answers

The measure of C 40 degrees

Answer:

List all of the solutions.

C = A = 60 ° = a = 9 = c = 5 =

Step-by-step explanation:

draw a flowchart to calculate the average from 25 exam scores​

Answers

Answer:

?

Step-by-step explanation:

help me.............​

Answers

Answer:

is there a right angle?

Step-by-step explanation:

2u = u + 43

u = 43?

Write an expression that represents the product of q and 5 divided by 2. Plz Help Me

Answers

Answer:

(5q)/2

Step-by-step explanation:

Since we want the q x 5 to be done first, we must use parentheses.

(5q)/2 (5q is a shorthand way to wrote 5 times q)

Please help with 1 and 2 I give brainliest and 37 points

Answers

Answer:

1) -1 < 2

2) -2 > -4

Step-by-step explanation:

find the missing angles​

Answers

Answer:

112 and 68 (same as matching above ones)

Step-by-step explanation:

Use the distributive property to write an equivalent expression. 8(10p + 6q - 1)​

Answers

Answer:

80p + 48q - 8

Step-by-step explanation:

Adam divides 8032 x 32 in which place write the first digit of the quotient

Answers

Answer:

100

Step-by-step explanation:

8032\32

What is the y coordinate of the solution

Answers

Answer:

8

Explanation:

3x-7=x^2-7x+18

X= 5

Y=3(5)-7 aka 15-7

=8

what is the equivalent ratio to 16 56​

Answers

Answer:

The number 2

Step-by-step explanation:

Answer: easy question.The ratios are 1. 32:1122) 2. 8:28 hope that helps u

Step-by-step explanation:

I REALLY NEED HELp!!!!!!!!

Answers

                                Retail Price      Quantity     Total Price

Twister Pen                   .35          *        2        =     $0.70

Mini Fish Eraser            .50          *        1         =     $0.50

Happy Cap Eraser        .05          *        5        =     $0.25

Erasing Grip                  .35          *        3        =     $1.05

                                                                               ---------

Subtotal                         .7 + .5 + .25 + 1.05    =     $2.50

Sales Tax Amount (unknown because we aren't given a tax value)

Total (also unknown for the same reason)

                                             Retail Price      Quantity     Total Price

Twister Eraser                            .35          *        3        =      $1.05

Astral Wonders Pencils             .20          *        4        =      $0.80

Criss Cross Critters                    .15           *       2        =      $0.30

Traction Mechanical                      

Pencil                                         .35           *       2        =      $0.70

Muchin Mike Sharpener           .50           *       2        =      $1.00

                                                                                            ----------

Subtotal                                 1.05 + .8 + .3 + 0.7 + 1    =     $3.85

Sales Tax Amount (unknown because we aren't given a tax value)

Total (also unknown for the same reason)

Best of Luck!

Simplify the following expression: -4(k - 7)

Answers

Answer:

-4k+28

Step-by-step explanation:

Answer:

-4k+28

Step-by-step explanation:

multiply -4k inside the parentheses

-4k x k

-4 x 7

= -4k+28

Is each expression equivalent to 6 * 53? Justify your reasoning.
a. 6 * 50 + 6* 3
b. 10 * 53 -4 53
c. 6 50 + 3
d. 6 * (50 + 3)

Answers

Answer:

a, b, d. Yes c. No

Step-by-step explanation:

a. 6 * 50 + 6* 3  = 6* ( 50 + 3) = 6* 53

Yes

b. 10 * 53 -4*53  = (10 - 4)*53 = 6*53

Yes

c. 6 * 50 + 3  = 303

No

d. 6 * (50 + 3) = 6*53

Yes

Answer:

A, B, D = Yes

C = No

6 * 50 + 6* 3  = 6* ( 50 + 3) = 6* 53

10 * 53 -4*53  = (10 - 4)*53 = 6*53

6 * 50 + 3  = 303

6 * (50 + 3) = 6*53

Factor:
2
x" – 36 = 0

Answers

Answer:

36 is answer

Step-by-step explanation:

36 - 36 is equal to 0

Answer: SOrry no answer im just dumb :( but lonely so hear me out. ( if u dont care just earse it )

Step-by-step explanation:

Ok I don't have any friends but I have dated a boy, he was my first bf and he broke up with me bc i text him for 7 days bc don't  have a phone and ye he broke up with me bc of that anywayss he told me he missed me and I was so stupid that I said why are u telling me this is you broke up wit me ? rightt and then 2 moths later I stared to miss him :(( i told him that I miss him but I didn't want him back but all he said was that wen did u start cathcing feeling for me? and how did u start catching feelings? and blah blah blah. soo yeah i texted him and he just leaves me on delivered even wen can see that hes active like idk just sad :(( (sorry for telling you this. its cs idk just sadddd :(((((  )

Four more than twenty-six time a number is equivalent to 12 times the same number less 15.
What is the number?

Answers

Answer:

n = -19/14

Step-by-step explanation:

Please transcribe this into a symbolic equation:

26n + 4 = 12n - 15

Then 14n = -19, or n = -19/14.

help child.......help me

Answers

my answer:

-2.9d+4.8h-16

Explanation:

1.73 to 1.52 write fraction in simplest form

Answers

Answer:

I think that the answer that 1.13815789. I hope that this helps:)

Step-by-step explanation:

Where is the blue dot? Fill in the blank

Answers

Answer:

-19

Step-by-step explanation:

It's every 3 numbers because -7 would be between -10 & -4

Which equation is a point slope form equation for line AB?
y+1=−2(x−6)

y+6=−2(x−1)

y+2=−2(x−5)

y+5=−2(x−2)

Answers

Answer:

The equation of the line would be y + 6 = - 2(x - 1).

270 students in an elementary school. There are 5 boys for every 4 girls. How many boys are there in school

Answers

Answer:

150

Step-by-step explanation:

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