1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
erma4kov [3.2K]
3 years ago
15

g Z-Test for Population Means Calculate z-statistic of a population mean. Keith sampled 10 private universities in Colorado and

recorded the tuition cost. Keith wants to test the hypothesis that the tuition of these 10 universities is more expensive than the national average tuition, which is $29,056 with a population standard deviation of $3,339. z equals fraction numerator x with bar on top minus mu over denominator begin display style fraction numerator sigma over denominator square root of n end fraction end style end fraction If the sample mean is $31,650, what is the z-score
Mathematics
1 answer:
scoray [572]3 years ago
4 0

Answer: 2.46

Step-by-step explanation:

Formula for x-score is given by :-

Z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

, where \overline{x} = Sample mean , \mu= population mean, \sigma = population standard deviation, n= sample size.

As per given , n=10

\mu= $29,056

\sigma = $3,339

\overline{x} =  $31,650

Then,

z=\dfrac{ 31650-29056}{\dfrac{3339}{\sqrt{10}}}\\\\=\dfrac{2594}{\dfrac{3339}{3.16227766017}}\\\\=\dfrac{2594}{1055.88451073}=2.45670807142\approx 2.46

Hence, the z-score = 2.46

You might be interested in
Hey ! Can anyone help me solve these problems please. Thank you !
devlian [24]
The answer to solve these problems is that the full circle is 360 degrees, the way to find the answer is to have to equal sides that equal 360 degrees. That means one half of 360 degrees is 180 degrees. Hope this helps.
6 0
2 years ago
PLLLLLLLZZZZZZZZZZZZZZZ Help Me In the diagram, ZY = WX = 2 StartRoot 10 EndRoot. What is the perimeter of rectangle WXYZ? Start
jenyasd209 [6]

Answer:

The Answer Is C

Step-by-step explanation:

4 0
3 years ago
Write an inequality to represent the situation. <br> A cheese pizza costs at least $5.
Nady [450]
<
-  5 dollars, the V thing sits on top of the line and 5 comes after signifying that it could be 5 dollars or more
8 0
3 years ago
Read 2 more answers
What is the inverse of cube root x/3 +1
Ostrovityanka [42]

Answer:

{f}^{ - 1} (x) = 3 {x}^{2}  - 3

Step-by-step explanation:

We want to find the inverse of

y = \sqrt[3]{ \frac{x}{3} + 1}

We interchange x and y to get:

x= \sqrt[3]{ \frac{y}{3} + 1}

We solve for y;

{x}^{2}  =  \frac{y}{3}  + 1

Multiply through by 3

3 {x}^{2}  = y + 3

Subtract 1 from both sides:

y = 3 {x}^{2}  - 3

Therefore the inverse is

{f}^{ - 1} (x) = 3 {x}^{2}  - 3

8 0
3 years ago
Help me pleaseee thank youu
snow_tiger [21]

Answer:

C

Step-by-step explanation:

Let's use the formula!

6/-4 - -2/-4 = 8/0.

Since this is divided by 0, this means that it is undefined.

So C

5 0
3 years ago
Other questions:
  • Factor<br><img src="https://tex.z-dn.net/?f=%7Bm%7D%5E%7B2%7D%20-%205mn%20%2B%2030%20%7Bn%7D%5E%7B2%7D%20" id="TexFormula1" titl
    5·1 answer
  • The total amount of water a tank can hold is 14 and one-half gallons. Raul wants to find out how many 1 and one-fourth-gallon bu
    11·2 answers
  • I need help on my math question for homework please help me,<br> What is -4x+3y=12?
    8·1 answer
  • A mobile phone company uses the formula C = 10t + 20m to calculate the total cost of a bill. C is the total cost of the bill in
    11·1 answer
  • 5x^2+3x=252<br> Ok because I need help
    12·1 answer
  • HELPPPP. SOMEONE HELP PLEASE
    8·2 answers
  • How to I find the area and perimeter of algebra tiles
    10·1 answer
  • Please help with question 22b! Thanks :)
    8·2 answers
  • This trapezoid is made up of two right triangles and one rectangle.
    7·1 answer
  • Write the point-slope form AND slope-intercept form equations for the line that passes through the points (2, -4) and (3, -7)
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!