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
OleMash [197]
2 years ago
7

A lawn service owner is testing new weed killers. He discovers that a particular weed killer is effective 89% of the time. Suppo

se that this estimate was based on a random sample of 60 applications. Construct a 90% confidence interval for p, the true proportion of weeds killed by this particular brand. what is the upper confidence limit for p
Mathematics
2 answers:
expeople1 [14]2 years ago
6 0

Answer:

Answer:

The 90% confidence interval for p is (0.8236, 0.9564). The upper confidence limit for p is 0.9564.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.

In which

z is the zscore that has a pvalue of .

He discovers that a particular weed killer is effective 89% of the time. Suppose that this estimate was based on a random sample of 60 applications.

This means that

90% confidence level

So , z is the value of Z that has a pvalue of , so .

The lower limit of this interval is:

The upper limit of this interval is:

The 90% confidence interval for p is (0.8236, 0.9564). The upper confidence limit for p is 0.9564

Step-by-step explanation:

marissa [1.9K]2 years ago
3 0

Answer:

The 90% confidence interval for p is (0.8236, 0.9564). The upper confidence limit for p is 0.9564.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

He discovers that a particular weed killer is effective 89% of the time. Suppose that this estimate was based on a random sample of 60 applications.

This means that \pi = 0.89, n = 60

90% confidence level

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.89 - 1.645\sqrt{\frac{0.89*0.11}{60}} = 0.8236

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.89 + 1.645\sqrt{\frac{0.89*0.11}{60}} = 0.9564

The 90% confidence interval for p is (0.8236, 0.9564). The upper confidence limit for p is 0.9564.

You might be interested in
Find the solution of the system of equations.
AnnyKZ [126]

Answer:

x=-2 and y=-3

Step-by-step explanation:

2x+4y=-16

-2(-2x+2y=-2)

2x+4y=-16

4x-4y=4

6x=-12

x=-2

2x+4y=-16

2(-2)+4y=-16

-4+4y=-16

+4        +4

4y=-12

y=-3

6 0
3 years ago
Read 2 more answers
How do I write each number as a power of the given base? <br><br>example: 49; base 7
VLD [36.1K]
7^n=49
we know that 7*7=49 so thus 7^2=49
7^n=7^2
therefor n=2
it is written as 7^2
7 0
3 years ago
Please I need this too NOww PLEASE ASAP
FromTheMoon [43]

Answer:

∠ ABC = 53.5°

Step-by-step explanation:

The inscribed angle ABC is half the measure of the intercepted arc AC

∠ ABC = \frac{1}{2} × 107° = 53.5°

5 0
3 years ago
According to the 2000 Census the population of Canton was 7,720. Holly Spring's population was 3,200. Canton's population increa
Kazeer [188]
Firstly, the rate of increase of Canton = 80/7720 = 0.010
The rate of increase of HP = 120/3200 = 0.0375
Apply  the formula of compound interest==> A =A'(1+i)^n
The population will be equal when the following equality is satisfied

7720(1+0.01)^n = 3200(1+0.0375)^n

or

7720x1.01^n = 3200x1.0375^n

Divide both sides by 3200 ===>(193/80)x1.01^n=1.0375^n
8 0
3 years ago
Read 2 more answers
What is equivalent to 5(8d)
kati45 [8]

Answer: ( 2 + 3 ) ( 8d )

Step-by-step explanation:

There are multiple possible answers and I'm not sure if you're missing part of the question.

Correct me if I am incorrect.

8 0
2 years ago
Read 2 more answers
Other questions:
  • How do you solve for a missing component x ? 180:x::12:24
    15·1 answer
  • How many different simple random sampmes of size 5 can be obtained from a pppulation whose size is 43?​
    8·1 answer
  • 9,471 divied by 8 and place value chart
    6·1 answer
  • -3x-4y=-2 and y=2x-5. What is y? *
    8·1 answer
  • Someone help me with this ASAP I’ll mark u as brilliant
    5·1 answer
  • A driver was at 60m below sea level. the driver swam up 2m every 5 seconds.explain whether the driver would have reached the sea
    9·1 answer
  • Please help! I will give brainly!
    7·1 answer
  • Somebody explain!!!!!!!!!!!
    12·2 answers
  • A leaking tap wastes 3,750 ml of water in 1 hour how much water will be wasted in a day??​
    9·2 answers
  • Evaluate each expression.<br>3^4<br>2^5​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!