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

Select all the functions that have no real number solution.
4x^2 + 100 = 0
3x^2 - 9 = 0
x^2+ 1 = 0
6x^2 - 216 = 0
x^2 - 49 = 0

Answers

A and c both have no real solutions. If you look it up, Brainly already gives you the answer.

What is the mean of the values in the dot plot?



Enter your answer in the box.

Answers

Answer:

The mean is 46.

Step-by-step explanation:

To find the mean of these points add the values together. So that's one 40, two 41's, one 45, two 48's, three 49's and one 50.

40 + (2 * 41) + 45 + (2 * 48) + (3 * 49) + 50

Multiply what's in the parentheses.

40 + 82 + 45 + 96 + 147 + 50

Add, going from left to right

122 + 45 + 96 + 147 + 50

167 + 96 + 147 + 50

263 + 147 + 50

410 + 50

460

Now, divide that by how many dots there were (10).

460/10

The mean of the values in this dot plot is 46.

please help me with this question fast!!!!

Answers

reflection and translation

If I have 6 pencils and my friend has 7 apples how many pancakes can fit on the roof.
a. purple because pancakes are purple
b. Yellow because aliens don't wear hats
c. the square root of the sun
d. pencil

Answers

Answer:

red

Step-by-step explanation:

Answer:

e

Step-by-step explanation:

depending on how big your roof is, and how high you can stack the pancakes, and the number of non hat wearing aliens that are eating the pancakes, it all really depends.  but if thats wrong the answers pencil

Which is the solution to the inequality? 1/4 + x < 5/6​

Answers

Answer:

x<7/12

Step-by-step explanation:

1/4+x<5/6

24×1/4+24(x)<24×5/6

6+24x<20

24x<20-6

24x<14

24x/24<14/24

x<7/12

f(x)=6^x for x=2 help please

Answers

9514 1404 393

Answer:

  f(2) = 36

Step-by-step explanation:

Put 2 where x is and do the arithmetic.

  f(2) = 6^2

An exponent of 2 means 6 is a factor two times.

  f(2) = 6×6

  f(2) = 36

Answer:

36

Step-by-step explanation:

To evaluate f(x) = 6^x at x = 2, substitute 2 for x:

f(2) = 6^2 = 36

Find the value of the variable(s). If your answer is not an integer, leave it in simplest radical form.
x=10/3 x=10,y=30/3 x=30.y=10/3

Answers

Answer:

Use the fact that sin(x) = opp/hyp and tan(x) = opp/adj

where opp=opposite, hyp=hypotenuse, adj=adjacent and recall sin(30)=1/2 and tan(30) = 1/sqrt(3)

sin(30) = 1/2 = 17/y

y = 17(2) = 34

tan(30) = 1/sqrt(3) = 17/x  

x = 17sqrt(3)

So the answer is (d)

Note that you could have also use the Pythagorean theorem to find x instead of using tan(30).

HELP ! On #1 ASAP for math

Answers

Answer: 1=2x     2=(0, 1/4)

Step-by-step explanation:

4x-9 , 3x-8 Add
cause i'm too tired

Answers

Answer:

if your adding them together it would be -70

Step-by-step explanation:

4× -9 =-36

3×-8=-24

Answer:

-70 papi

Step-by-step explanation:

Write a equation that represents the situation

Answers

Answer:

13.75 divided by 4/5

Step-by-step explanation:

hope this helped :)

HELP ME ASAP PLZZ
Which table represents the function y = 3x – 1?


Input x 1 2 3
Output y 4 7 10

Input x 0 1 2
Output y -1 -2 -3

Input x 0 1 2
Output y -1 2 5

Input x 2 3 4
Output y 2 4 6

Answers

Answer:

Input x 0 1 2

Output y -1 2 5

Step-by-step explanation:

just plug in all the answers for x and solve the equation. like this:

y=3*0-1=

y=0-1=

y= -1

---------------------

y=3*1-1=

y=3-1=

y=2

--------------------------

y=3*2-1=

y=6-1=

y=5

------------------------

all the results match with the table

hope I helped God bless you

[tex]\sqrt{\frac{2}{2}[/tex]

Answers

2/2 is 1
Square root of 1 is 1

Parallel/perpendicular definition

Answers

Answer:

Parallel: extending in the same direction, everywhere equidistant.

Perpendicular: ar an angle of 90 to a givin line, plane or surface.

Answer:

Two or more straight lines having equal distance between them through out is parallel lines

Perpendicular lines are two lines at Right angles


Write down two different prime numbers that have a sum of 34.

Answers

Answer:

23+11

Hope that helps  :)

Answer:

31+3

Step-by-step explanation:

2,3,5,7,11,13,17,19,23,27,29,31

31+3=34

A whole pizza is cut into 8 pieces and you eat 2 of the 1/8 pieces, how much (in a fraction) is left over? 3/8


4/6


2/8


6/8

Answers

Answer:

6/8 is left

Step-by-step explanation:

Hope this helps!! Can I get brainliest please??? :)

8 pieces = 8/8

8/8 - 1/8 - 1/8 = 6/8

         or

8/8 - 2/8 = 6/8

what is exponential form of b•b•b•c•c​

Answers

Answer:

b^3 + c^2

Step-by-step explanation:

Answer:
b^3 * c^2

Explanation:
Here we see that there are 3 B’s being multiplied against each other. This can be written as b^3, because b^3 also represents b*b*b.
Next, there are two c’s being multiplied against each other. This can be written as c^2, because c^2 also represents c*c.
Now that we have found what the exponents are we can multiple both b^3 and c^2 to get our final answer of:
b^3 * c^2

I hope this helps!!
-Kay :)

What is a slope in mathematical terms

Answers

Answer:

"The slope of a line is a measure of its steepness. Mathematically, slope is calculated as "rise over run" (change in y divided by change in x)." 

Answer:

It is how steep a linear graph/function is.

Step-by-step explanation:

It is the m in the formula y=mx+b. The bigger the member the steeper.

Someone help me I don’t know how to do this

Answers

Answer:

17 and 59

Step-by-step explanation:

90-75=17 first one

180-121=59 second one plz give me brainnessttttt pllzzzz

Hey there!

So the first angle is a complementary angle, meaning that two angles put together will equal 90 degrees. Since we already know that one angle is 75 degrees, all we need to do is 90-75 and we get 15 degrees, which is the value of the missing angle.

The second angle is a supplementary angle, which means two angles equal 180 degrees. Since we know that one angle is 121 degrees, we can take that and subtract is from 180 degrees to get 59 degrees, which is the value of the missing angle.

Remember:

A complementary angle is made of up TWO angles that add up to 90 degrees.

A supplementary angle is made up of TWO angles that add up to 180 degrees.

I hope this helped!!!

Write an equivalent expression by distributing the "-−" sign outside the parentheses: -(-4.2w-7x-5.4)

Answers

Answer: 4.2*w + 7*x + 5.4

Step-by-step explanation:

Here we need to remember how the product of different signs works, here is the rule:

(+)*(+) = (+)

(+)*(-) = (-)

(-)*(+) = (-)

(-)*(-) = (+)

Now we want to distribute the negative sign in the equation:

"-(-4.2w-7x-5.4)"

We can write this as:

-(-4.2w-7x-5.4) = (-1)*(-4.2w-7x-5.4)

Now we can distribute the "-1"

Then we get:

(-1)*(-4.2w) + (-1)*(-7x) + (-1)*(-5.4)

We have 3 cases where we need to use the "(-)*(-) = (+)" rule, then we get:

(-1)*(-4.2w) + (-1)*(-7x) + (-1)*(-5.4) = 4.2*w + 7*x + 5.4

3 cups of tea and 4 cups of coffee costs £3.45 in total.
4 cups of tea and 1 cup of coffee costs £2.65 in total.
How much would it costs to buy one cup of each in total?​

Answers

Answer:

A) 3T + 4C = 3.45

B) 4T + 1C = 2.65 We'll multiply this by -4

B) -16T -4C = -10.60  then we'll add A)

A) 3T + 4C = 3.45

-13T = -7.15

Tea is .55

and coffee is

A) 3 * .55 + 4C = 3.45

4C = 3.45 -(3 * .55)

4C = 1.80

coffee is .45

Step-by-step explanation:

I agree with the person above me

example of variations natural resources

Answers

Answer:

Sexual reproduction promotes variable gene combinations in a population leading to genetic variation. Examples of genetic variation include eye color, blood type, camouflage in animals, and leaf modification in plants

Step-by-step explanation:

–19w + 11 = –17w − 19
w=
Please help, will mark brainliest to correct answer!

Answers

Answer:

w = 15

Step-by-step explanation:

We have an expression and are asked to solve for w.

-19w + 11 = -17w - 19

Subtract 11 from both sides :

-19w = -17w - 30

Add 17w to both sides :

-2w = -30

Divide -2 from both sides to isolate w :

w = 15

greatest integer of x < -3

Answers

Answer:

-4

Step-by-step explanation:

Here, we want to get the greatest integer less than -3

The integer less than -3 that is the greatest is -4

It is the internet directly after it to the left of the number line

Ricardo bought $46.23 worth of groceries and paid with a $100 bill. How much change did he receive?

Answers

Answer:

Step-by-step explanation:

You will need to subtract the amount paid from the total amount

100 - 46.23

= 53.77

Ricardo will receive $53.77 in change. :)

consider the function g(x) = 54(1/3)x. evaluate g(0). what point does this indicate on the graph if g?

Answers

If we’re following order of operations PEMDAS it would be g(0)=54(1/3)0
54x1/3=18
18x0=0 therefore the answer to the equation is 0

simplify these expressions: 12x - 3x​

Answers

Answer:

12x-3x

= 9x

Step-by-step explanation:

Hope it is helpful....

Kay is going to do some work in her garden. Her garden is in the shape of a rectangle. Kay thinks she can buy enough paint to cover the decking for less than £65 Is Kay correct?

Answers

Answer:

Still not sep-by-step explanation:

A music collection includes 19 ROCK CDs, 12 COUNTRY CDs, 6 CLASSICAL CDs, and 5 HIP HOP
CDs. What is the probability that a CD randomly selected from the collection IS a classical CD?

Answers

Answer:

6/42 = 1/7

Step-by-step explanation:

Divide the number of events by the number of possible outcomes.

Simplify the expression -(6 - 4p)

Answers

Hey there!

The answer to your question is [tex]-6+4p[/tex]

Given:

[tex]-(6-4p)[/tex]

First, we distribute the negative sign to both terms ([tex]6[/tex] [tex]and[/tex] [tex]-4p[/tex]) This would make the [tex]6[/tex] negative and the [tex]-4p[/tex] positive, so we have:

[tex]-6[/tex] [tex]and[/tex] [tex]4p[/tex]

Add them together and we get:

[tex]-6+4p[/tex]

Have a nice day!

261, 256,251,... what would be the 46th term

Answers

Answer:

36

Step-by-step explanation:

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