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
Amanda [17]
3 years ago
13

Write the null and alternative hypotheses for the following example. Determine if the example is a case of a two-tailed, a left-

tailed, or a right-tailed test.
(a) To test if the mean time a customer has to wait on the phone to speak to a representative of a mailorder company about unsatisfactory service is more than 12 minutes.
(b) To test whether or not a bank's ATM is out of service for an average of more than 10 hours per month
(c) To test if the mean credit card debt of college seniors is less than $100
(d) To test if the mean time a customer has to wait on the phone to speak to a representative of a mail-order company about unsatisfactory service is more than 12 minutes
Mathematics
1 answer:
Molodets [167]3 years ago
4 0

Answer:

Kindly check explanation

Step-by-step explanation:

(a)

H0 : μ = 12

H1 : μ > 12

This is a right tailed test ; the alternative hypothesis has a greater than sign, difference between sample and population mean value will be positive.

(b)

H0 : μ = 10

H1 : μ > 10

This is a right tailed test ; the alternative hypothesis has a greater than sign, difference between sample and population mean value will be positive.

(c)

H0 : μ = 100

H1 : μ < 100

This is a left tailed test ; the alternative hypothesis has a less than sign, difference between sample and population mean value will be negative.

(d)

H0 : μ = 12

H1 : μ > 12

This is a right tailed test ; the alternative hypothesis has a greater than sign, difference between sample and population mean value will be positive.

You might be interested in
If sec(x)=25/24, find cotangent (x)
nadezda [96]
The answer is 1.042 because you have to divide 25 by 24
8 0
4 years ago
2 1/6 - (-8/3) + (-4 7/9) =
Vladimir [108]

Answer:

1/18

Step-by-step explanation:

First make it so they all have the same denominator.

So...

2 3/18 - (- 48/18) + (- 4 14/18)

Then we remove parenthesis...

2 3/18 +48/18 - 4 4/18

1/18

hope this helps

brainliest?

5 0
3 years ago
HELLPPPP I WILL GIVE BRAINIEST!!!!!!!!!!!!<br><br> 2x+3=20-15
Nesterboy [21]

Here you go!

Answer: X = 1



8 0
3 years ago
Read 2 more answers
Pls help i will give u brianliest
Fynjy0 [20]

Answer:

Slope = -3

y-intercept = (0,-4)

Equation: y = -3x-4

Step-by-step explanation:

We can take any two input-output pairs from the table to find the equation of given function.

Linear function is given by:

y =mx+b

Here m is the gradient of the functions which is defined as:

m = \frac{rise}{run} = \frac{y_2-y_1}{x_2-x_1}

The input-output pairs are:

(x1,y1) = (-1,-1)

(x2,y2) = (0,-4)

First of all,

m = \frac{-4-(-1)}{0-(-1)}\\= \frac{-4+1}{1} = -3

Putting the value of slope in the equation

y = -3x+b

Putting (-1,-1) in the equation

-1 = -3(-1)+b\\-1 = 3+b\\b = -1-3\\b = -4

The equation will be:

y = -3x-4

Hence,

Slope = -3

y-intercept = (0,-4)

Equation: y = -3x-4

7 0
3 years ago
Can anyone solve 3m-5n=15 for N
Kazeer [188]
I hope this helps you

7 0
3 years ago
Other questions:
  • A circle has a radius of 6.87 feet. What is the circumference of this circle? Use 3.14 for pi. Round your final answer to the ne
    5·2 answers
  • Help me pls and I need the answer fast
    14·1 answer
  • a restaurant Bill Cames to 42.75. suppose the sales ya os 6% and a 15% tío os left on the amouny after the tac os added
    5·1 answer
  • “Use the properties to rewrite this expression with the fewest terms possible:
    13·1 answer
  • What is 4 and 2/5 multiplied by 16.5
    11·1 answer
  • At what rate must $287.50 be compounded annually for it to grow to $572.86 in 8 years?
    12·1 answer
  • What is 38,496 rounded to the nearest ten thousand
    5·2 answers
  • Find the value of x. <br> Answer choices<br> 4 4/5<br> 3 1/3<br> 4 2/3<br> 3 2/3
    8·1 answer
  • hat is the rectilinear distance between​ (−3, −6) and​ (14, −2)? A. 3 B. 21 C. 25 D. 18.79 E. 7 F. 15
    14·1 answer
  • Please find the value of x :)
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!