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
melisa1 [442]
3 years ago
9

J scored 80% on a test. He missed 4 problems. How many problems were on the test?

Mathematics
2 answers:
Maslowich3 years ago
8 0
He had 20 questions to answer hope it helps
mojhsa [17]3 years ago
7 0
He had 20 or more problems on the test but if u estimated it would be 19 but if i were u i would put down 20
You might be interested in
Leslie has 8 pencils.
Rudiy27
17 pencils. I’m preety sure
7 0
3 years ago
Read 2 more answers
Samuel uses a uniform probability model for an experiment using a deck of 30 cards. There are 6 blue cards, 6 red cards, 6 green
STALIN [3.7K]

DeeDee were were seeded seeded seeds

6 0
2 years ago
Read 2 more answers
Each year, more than 2 million people in the United States become infected with bacteria that are resistant to antibiotics. In p
Bingel [31]

Answer:

A)

<u><em>Null hypothesis:H₀:-</em></u><em> There is no significant difference between in drug resistance between the two states</em>

<u><em>Alternative Hypothesis :H₁:</em></u>

<em>There is  significant difference between in drug resistance between the two states</em>

<em>B)</em>

<em>The calculated value Z =  2.7261 > 2.054 at 0.02 level of significance</em>

<em> Rejected H₀</em>

<em>There is a significant difference in drug resistance between the two states.</em>

C)

P - value = 0.0066

<em>P - value = 0.0066 < 0.02</em>

<em>D) </em>

<em>1) Reject H₀   </em>

<em>There is a significant difference in drug resistance between the two states.</em>

Step-by-step explanation:

<u><em>Step(i):-</em></u>

<em>Given first sample size n₁ = 174</em>

Suppose that, of 174 cases tested in a certain state, 11 were found to be drug-resistant.

<em>First sample proportion </em>

                    p_{1} = \frac{x_{1} }{n_{1} } = \frac{11}{174} = 0.0632

<em>Given second sample size n₂ = 375</em>

Given data  Suppose also that, of 375 cases tested in another state, 7 were found to be drug-resistant

<em>Second sample proportion</em>

<em>                  </em>p_{2} = \frac{x_{2} }{n_{2} } = \frac{7}{375} = 0.0186<em></em>

<u><em>Step(ii):-</em></u>

<u><em>Null hypothesis:H₀:-</em></u><em> There is no significant difference between in drug resistance between the two states</em>

<u><em>Alternative Hypothesis :H₁:</em></u>

<em>There is  significant difference between in drug resistance between the two states</em>

<em>Test statistic</em>

<em>           </em>Z = \frac{p_{1}-p_{2}  }{\sqrt{PQ(\frac{1}{n_{1} }+\frac{1}{n_{2} } ) } }<em></em>

<em>        Where </em>

<em>         </em>P = \frac{n_{1}p_{1} +n_{2} p_{2}  }{n_{1} +n_{2} }<em></em>

<em>        </em>P = \frac{174 (0.0632) + 375 (0.0186) }{174+375 } =  \frac{17.9718}{549} = 0.0327<em></em>

<em>       Q = 1 - P = 1 - 0.0327 = 0.9673</em>

<u><em>Step(iii):-</em></u>

<em></em>

<em>  Test statistic</em>

<em>           </em>Z = \frac{p_{1}-p_{2}  }{\sqrt{PQ(\frac{1}{n_{1} }+\frac{1}{n_{2} } ) } }<em></em>

<em>          </em>Z = \frac{0.0632-0.0186  }{\sqrt{0.0327 X 0.9673(\frac{1}{174 }+\frac{1}{375 } ) } }<em></em>

<em>       Z  =   2.7261</em>

<em>   </em>

<em>Level of significance = 0.02 or 0.98</em>

<em>The z-value = 2.054</em>

<em>The calculated value Z =  2.7261 > 2.054 at 0.02 level of significance</em>

<em>    Reject H₀   </em>

<em>There is a significant difference in drug resistance between the two states.</em>

 <u><em>P- value </em></u>

<em>P( Z > 2.7261) = 1 - P( Z < 2.726)</em>

<em>                         = 1 - ( 0.5 + A (2.72))</em>

<em>                         = 0.5 - 0.4967</em>

<em>                          = 0.0033</em>

we will use two tailed test

<em>2 P( Z > 2.7261)  = 2 × 0.0033</em>

<em>                            = 0.0066</em>

<em>P - value = 0.0066 < 0.02</em>

<em>  Reject H₀   </em>

<em>There is a significant difference in drug resistance between the two states.</em>

8 0
2 years ago
Help plzzzzzzzzzzzzzzzzzzzzzzz
wel
HMMMMMMM...It could be C...

An Arc is the the end of the circle, the OUTER rim..do you get what I'm trying to say? SO, if you look at AC, it looks like an arc.

Hope this helps!
5 0
3 years ago
An airplane flies 80 km in 10 minutes and then flies 100 km in 20 minutes what is the average speed
Eddi Din [679]
The average speed = (speed 1 + speed 2)/2
the average speed = (80/10 + 100/20)/2
the average speed = (8 + 5)/2
the average speed = 13/2
the average speed = 6.5 km/minute
8 0
2 years ago
Other questions:
  • Jerry is making trail mix for his camping trip. He had 200 grams of peanuts, 350 grams of raisins, and 735 grams of pretzels. He
    14·1 answer
  • NEED HELP FAST WILL GIVE BRAINIEST
    7·2 answers
  • Anyone know how to do these?
    11·1 answer
  • - It requires 1/4 of a credit to play a video game for one minute.
    7·1 answer
  • I need help with all of them thanks
    6·2 answers
  • Assume that you are going to open a checking account. You are examining different banks and banking accounts, to choose a
    6·1 answer
  • I need it urgent now
    9·1 answer
  • Can someone pls help me out on the middle one pls ?:(
    7·1 answer
  • Sylvia has 51.78 pounds of dirt. She has 20 buckets and would like to put 2.56 pounds of dirt into each bucket. Are there enough
    8·1 answer
  • The number of guests, g, coming for dinner<br> is not 8
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!