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
Alexeev081 [22]
3 years ago
14

A researcher has two percentages and wants to know if the percentages are statistically different. The researcher calculates the

z value and finds that it is 4.21. This means that the two percentages: A) Are the same. B) Are not statistically different. C) Have a 421 percent chance of not being different. D) Are statistically different.
Mathematics
1 answer:
love history [14]3 years ago
4 0

Answer:

p_v =2*P(Z>4.21) =2.55x10^{-5}

And we can use the following excel code to find it:"=2*(1-NORM.DIST(4.21,0,1,TRUE)) "

With the p value obtained and using the significance level assumed for example\alpha=0.05 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the percentage 1 is significantly different from the percentage 2.

D) Are statistically different.

Step-by-step explanation:

The system of hypothesis on this case are:  

Null hypothesis: \mu_1 = \mu_2  

Alternative hypothesis: \mu_1 \neq \mu_2  

Or equivalently:  

Null hypothesis: \mu_1 - \mu_2 = 0  

Alternative hypothesis: \mu_1 -\mu_2\neq 0  

Where \mu_1 and \mu_2 represent the percentages that we want to test on this case.

The statistic calculated is on this case was Z=4.21. Since we are conducting a two tailed test the p value can be founded on this way.

p_v =2*P(Z>4.21) =2.55x10^{-5}

And we can use the following excel code to find it:"=2*(1-NORM.DIST(4.21,0,1,TRUE)) "

With the p value obtained and using the significance level assumed for example\alpha=0.05 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the percentage 1 is significantly different from the percentage 2.

And the best option on this case would be:

 D) Are statistically different.

You might be interested in
Which ordered pair is a solution of the equation?<br> 7x-2y=-57x−2y=−5
Yuri [45]

Answer:

what ordered pairs?

Step-by-step explanation:

6 0
2 years ago
Complete the rational operation <br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7Bx%20-%205%7D%20%20-%20%20%5Cfrac%7Bx%7
prisoha [69]
We have
                             3 / (x-5) - x/5
We make the GCF and we have
                                    15/[ 5(x-5) ] - x(x-5)/[ 5(x-5)]
                                  = [ 15 - x(x-5) ]  [5(x-5)]
                                  = [ 15 - x^2 + 5x] / [ 5 (x-5) ]
                                  = [15 - x^2 + 5x]/[5x - 25]
An answer to your question is (15-x^2+5x)/(5x-25)
6 0
3 years ago
Katie grew 26 flowers with 13 seed packets. With 55 seed packets, how many total flowers can Katie have in her garden?
Leokris [45]
110 flowers in her garden.
3 0
3 years ago
Read 2 more answers
Tom had 260 dollars to spend on 8 books. After buying them he had 12 dollars. How many much did each book cost?
fgiga [73]
You will subtract 12 from 260 and get 248 then you will divide 248 by 8 and get 31 dollars spent per book.
7 0
3 years ago
Which of the numbers below is less than zero? Select all that apply.
SSSSS [86.1K]

Answer:

-13 is less than zero in the options

7 0
2 years ago
Other questions:
  • Simplify the expression and write without negative exponents
    5·1 answer
  • What is the value of the function when x = 4?<br><br> y = 3x + 7
    9·2 answers
  • Marcella divide 40.8 gallons of paint among 8 containers. how much paint is in each container
    15·2 answers
  • Write cot θ in reduced fraction form for 26/24
    5·1 answer
  • PLEASE PLEASE HELP ME WITH THIS!
    8·1 answer
  • Let C be the nullspace of the 1 x 9 matrix H1 (6.2.6) In other words, let C be the parity check code of length 9 (8 data bits, 1
    8·1 answer
  • Solve 3a – 8= 5a + 12<br><br> Show your work. (please)
    11·1 answer
  • What is X. PLEASE HELP I GIVE BRAINLEIEST
    11·1 answer
  • Minha says triangle A with angles measuring 34 ° and 57 ° is similar to triangle B with angles measuring 57 ° and 89 ° . What Mi
    7·1 answer
  • Find the number that is between 0 and 120, is even, is a multiple of 5 and is the result of multiplying one of the counting numb
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!