A teacher initially plans to take an SRS of size 50 from his large high school and calculate the sample mean x bar of student GPAs. Later, the teacher decides to increase the sample size so that the standard deviation of the sampling distribution of x bar will be half as big as when using a sample size of 50. What sample size should the teacher use?
57
100
150
200
354​

Answers

Answer 1

Answer:

should be 200 because I think you quadrupole it and 50 x 4 =200

Step-by-step explanation:

Answer 2

Answer:

The answer is 200. 50 * 4 = 200.


Related Questions

Rosa deposits $5000 in a savings account that gets compounded interest annually at a rate of 8%. If she leaves her money in the account for 2 years, how much will she have at the end of that time?

Answers

Answer:

$5318

Step-by-step explanation:

First, converting R percent to r a decimal

r = R/100 = 4%/100 = 0.04 per year,

then, solving our equation

I = 2650 × 0.04 × 3 = 318

I = $ 318.00

The simple interest accumulated

on a principal of $ 2,650.00

at a rate of 4% per year

for 3 years is $ 318.00.

what is 5/18 divided by 2/6

Answers

Answer:

0.02314814814 ooooorrrrr...... as a fraction..... 5/6

Step-by-step explanation:

I hope this helps!!!!!!!! PLEASE MARK ME BRANILIEST!!!!

Answer:

5/6 ( I think )

Step-by-step explanation:

Way 1. All you have to do is make the fractions into decimals, then divide, and finally change you final decimal back into a fraction!

Way 2. Change the division into multiplication ( to do that flip the second fraction)--> 5/18 x 6/2 then multiply!

If I'm wrong just use the info I gave you, and try it yourself!

I hope this helps, and have a great day!

P.S. Way 2 is easier than Way 1!

The vertices of parallelogram DEFG are E(-1,4) F(5,6) and G (8,0). Find the coordinates of D

Answers

Answer:

The coordinates of D are (2,-2)

Step-by-step explanation:

The coordinates of point D are (2,-2)

The coordinates of the parallelogram are given as:

E(-1,4),  F(5,6) and G (8,0)

For the coordinates to represent a parallelogram, the following must be true

[tex]x_D - x_E = x_G - x_F[/tex]

[tex]y_D - y_E = y_G - y_F[/tex]

So, the equations become

[tex]x_D -(-1) =8-5[/tex] and

[tex]y_D -4 =0-6[/tex]

Solve for x and y in the above equations

[tex]x_D -(-1) =8-5[/tex]

[tex]x_D +1 = 3[/tex]

[tex]x_D = 3-1[/tex]

[tex]x_D = 2[/tex]

[tex]y_D -4 =0-6[/tex]

[tex]y_D - 4 = -6[/tex]

[tex]y_D = 4-6[/tex]

[tex]y_D =-2[/tex]

Hence, the coordinates of point D are (2,-2)

Read more about parallelograms at:

https://brainly.com/question/11874218

Which function is best represented by this graph?

Answers

Answer:

J

Step-by-step explanation:

The y-intercept is 3, and the slope is -1/2

Answer: G

the formula is y= mx+c

y -intercept (c) is what number it passes on the y-axis which is 3

to find gradient you need to form a triangle of any choice using the line so I did 4 across and 2 down , you put that into a fraction 2/4 which is 2 and I've done it upside down so it will be -2

solve the equation for all values of x by completing the square
[tex] {x}^{2} - 35 = - 2x[/tex]

Answers

Answer:

x=5  x= -7

Step-by-step explanation:

X=5
X=7
Hope that it is right

Michael buys some items at a grocery store.
4 boxes of cereal at $3.45 per box
1
-1 pounds of oranges at $3.98 per pound
2 gallons of fruit juice at $4.35 per gallon

Answers

What’s the question? How much he paid? 26.48

Must show work!
Write each percent as a fraction and as a decimal?
37%

Answers

Answer:

37% = 0.37 = 37/100

Step-by-step explanation:

hope this helps :)

s=2πcx+3πc^2 solve for x

Answers

Answer:

x = (s - 3πc^2) / 2πc.

Step-by-step explanation:

s = 2πcx + 3πc^2

2πcx  = s - 3πc^2

x = (s - 3πc^2) / 2πc.

Factorise these expressions
a.
[tex] {x}^{2} + 20x + 19[/tex]
b.
[tex] {z}^{2} - 2z + 1[/tex]
c.
[tex]9(x - 1) - 3x[/tex]

Answers

Answer:

a. (x+19)(x+1)

b. (z-1)(z-1)

c. 3(2x-3)

Step-by-step explanation:

a. x^2+20x+19

(x+19)(x+1)

b. z^2-2z+1

(z-1)(z-1)

c. 9(x-1)-3x

9x-9-3x

6x-9

3(2x-3)

Chase needs 3 quarts of pineapple juice for the punch he is making. How many pints does he need to buy?

Answers

Answer:

6 pints

Step-by-step explanation:

Answer:

15

Step-by-step explanation:

Describe the lines in the figure below identify the figure

Answers

Answer:

The lines are congruent, the figure is a parallelogram.

Answer:

The figure shown is a parallelogram.

The lines on the sides are parallel

And the line on the top and the line on the bottom are parallel

Step-by-step explanation:

what is 25.15/179.30 simplified as a fraction please help i suck at math
ill mark you brainliest

Answers

Answer:

503

------

3586

Step-by-step explanation:

that's as small as I can get it

please help 15 points

Answers

Answer:

1. Given

2. Corresponding Angles Theorem

3. ∠NPO ≅ ∠MQN (or something similar)

4. AA Similarity Theorem

Step-by-step explanation:

1. Line MQ || Line OP is the given statement.

2. ∠QNM on the left triangle corresponds to ∠PNO on the second triangle.

3. These two angles are cut by a transversal (Line MP), and thus are congruent.

4. ∠MQN and ∠NMQ are congruent to ∠NOP and ∠NPO respectively, so the triangles are similar.

Plz help !!!!!!!! Already

Answers

Answer:

15 and 105

Step-by-step explanation:

well this should be simple

if a small car averages 29 miles MORE, and it averages 44, the. just take 44 - 29.. which is 15.

Well if he has to go 240 miles, and he’s drove 135, just take 240 - 135 = y

240 - 135 = 105

y = 105

4. The black triangle was transformed to
make the gray triangle. Which represents
the transformation?
A (x, y) + (x + 3, y + 3)
B (x, y) → (3x, 3y)
C (x,y) → (x-2, y-2)

Answers

The answer is B

Explanation:

1) obeserve os numeros e diga:

-15, +6, -1, 0, +54, +12, -93, -8, +23, -72, +72

a) quais os numeros inteiros negativos?
b)quais os numeros inteiros postivos?​

Answers

Numeros inteiros negativos
-1,-8,-15,-72,-93
Números inteiros positivos
0,+6,+12,+23,+54,+72

Dame un corazón porfa

Helpp mee (10 points)

Answers

Number 2 is 15cm^3 don’t know the other ones

What value of y makes this true?
25 - y = 15
a. 10
b. 8
c. 11
d. 9

Answers

y = 10

25-10=15


Hope this helps

Brainliest plzzzzz

Answer:

A. 10

Step-by-step explanation:

y = 10

Im the best mathmatician at my whole college so you can trust me

I need help please (brainllest)

Answers

Answer:

Plant A: y=x+4

Plant B: y=1/3x+6

Answer:

Plant A: 1x + 4 = y; Plant B: 1/3x + 6 = y

Step-by-step explanation:

Which of the following edges is parallel to AB?

DT
BC
QR
BR

Answers

Answer:

QR

Step-by-step explanation:

Other than all opposite pairs of sides are parallel, all other segments intersect at a point.

Answer:

QR

Step-by-step explanation:

QR is parallel to AB because it is going in the same direction as QR is, and the other answer choices are incorrect.

(3) need help plz Asap

Answers

Answer:

brainlist plzz

Step-by-step explanation:

D....................................

The width of a rectangle is the length minus 3 units. The area of the rectangle is 40 units. What is the width, in unit, of the rectangle?

Answers

Answer: The width is 5

Step-by-step explanation:

The equation is x*(x-3)=40 solviing for x which is 8 but since width is x-3 then 8-3=5

What is the area??? I don't understand I have tried so hard.

Answers

8 * 5.7 = 45.6


Hope this helps!!!!

Answer:

should be 45.6

Step-by-step explanation:

8x- 2 =54
helppp ? ??

Answers

x=7
hope this helps!!
8x-2=54
54+2=56
56/8= 7

X=7

Plssss someoneee helppp MEE withhh thissss PLEASEEEE

Answers

Answer:

I think it is 5x+2y=41

Step-by-step explanation:

plzzz help me im trustin yall

Answers

Answer:

B

Step-by-step explanation:

(8x + 8)(x + 3) = [tex]8x^{2} +24x+8x+24[/tex] = [tex]8x^{2} +32x+24[/tex].

(8x+8)(x+3). 8x*X+8x*3+8*x+8*3. 8x^+24x+8x+24. 8x^+32+24. Answer is B

HELP PLEASE PLEASE ILL GIVE BRAINLY

Answers

The firs one is correct.

Answer:

the first one 24r+200=500

The student council at Eleanor Roosevelt High School is taking a survey of student opinions on this year's homecoming theme. To decide who to survey, the council creates a master alphabetized list of names from every student in the school, then selects every 20th student from the list. Will the results of this survey be valid? Why or why not?

yes, because a random sample is taken from all of the student body

yes, because the survey will include all of the seniors

no, because the survey will include freshman

no, because the survey will not include members of the faculty

Answers

No because the survey will not include Keebler’s of faculty

Answer:

no, because the survey will not include members of the faculty

Researchers study the population of bass in a lake. The researchers catch, tag, and release 50 bass into the lake. During a fishing tournament the following week, competitors catch and release 525 bass, 15 of which had been previously tagged by the researchers.
What is the best estimate for the number of bass in the lake?

Answers

Answer: B.

Step-by-step explanation: 550 bass

x-4(3-2x) =3(3x+4) is this many soultions no solutions

Answers

No solutions. It would be: 9x-12=9x+12. The difference is that one of the 12’s is negative and one is positive. Hope this helps! Have a great day :)
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