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
A rectangular tank measuring 50 cm x 30 cm x 60 cm was completely filled with water. 1 5 of the water in the tank was transferre
Ierofanga [76]

Answer:

<em>72,000cm³</em>

Step-by-step explanation:

Volume of the rectangular tank = Length *  Width * Height

Given

Length = 50cm

Width = 30cm

Height = 60cm

Get the volume:

Volume = 50*30*60

Volume = 90,000cm³

Hence the volume of the rectangular tank is 90,000cm³.

If 1/5 of the volume of water was transferred to another tank, the volume transferred will be:

Amount transferred = 1/5 * 90,000

Amount transferred = 18000cm³

Amount left in the tank = 90,000 - 18,000

<em>Amount of water left in the tank = 72,000cm³</em>

5 0
2 years ago
In a 24 marathon, solve the 24 puzzle given by the poster above you, and post a new 24 puzzle of your own!
Black_prince [1.1K]
1234567891011121314151617181920
7 0
1 year ago
Read 2 more answers
If x is an odd number, which of the following is also odd? * X + 1, X + 2, 2x + 2 or 3x + 1​
emmainna [20.7K]

Answer:

x+2

Step-by-step explanation:

i put mi x as one so

....that how i get my anwser

5 0
2 years ago
I know this but my brains not working
Masja [62]

Answer:you just find the answer from the 2 fractions you have

Step-by-step explanation:

8 0
3 years ago
When filled, a particular round balloon has a diameter of 14 inches (in.).
icang [17]

Answer:

1436.76 in.^3

Step-by-step explanation:

This question means to find the volume of a sphere with a diameter of 14 inches. The formula for the volume of a sphere is 4/3πr^3, so we need to find the radius, which is half the diameter. Half of the diameter is 7 inches, so now we can plug in our values to find the volume is about 1436.76 cubic inches.

4 0
3 years ago
Other questions:
  • Gas and oil costs = $1,100.00 Repair/Maintenance = $800.00 Operating cost per mile = $0.14 Miles driven =
    9·2 answers
  • Diego wanted to find the 7% sales tax on purchases that total $15.99. On his calculator the display showed $1.1193 as the tax. H
    9·1 answer
  • A cab ride from your home to the airport cost $23.47. If you want to tip the cab driver close to 10 percent of the fare, how muc
    7·1 answer
  • EASY I AM JUST DUMB!! WILL GIVE BRANLIEST!!! HELP ASAP!!!!
    5·2 answers
  • What is the measure of A 54°<br> D. 66°<br> B. 56°<br> E. 114°<br> C. 58°
    12·2 answers
  • 876/60 pls what is the answer​
    10·2 answers
  • Help plz:))) I’ll mark u brainliest <br> ASAP!!!
    11·1 answer
  • Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.
    13·1 answer
  • Dale is following this recipe to make shortbread fingers. Dale uses 240 g of flour. How many shortbread fingers does he make? Re
    12·1 answer
  • A group of seven kids line up in a random order. Each ordering of the kids is equally likely. There are three girls and four boy
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!