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
Andreyy89
3 years ago
7

The Centers for Disease Control and Prevention (CDC) report that gastroenteritis, or stomach flu, is the most frequently reporte

d type of recreational water illness. Gastroenteritis is a viral or bacterial infection that spreads through contaminated food and water. Suppose that inspectors wish to determine if the proportion of public swimming pools nationwide that fail to meet disinfectant standards is different from 10.7%, which was the proportion of pools that failed the last time a comprehensive study was done, 2008.
A simple random sample of 30 public swimming pools was obtained nationwide. Tests conducted on these pools revealed that 26 of the 30 pools had the required pool disinfectant levels.

Does this sample meet the requirements for conducting a one-sample z ‑test for a proportion?

a. No, the requirements are not met because the population standard deviation is not known.
b. No, the requirements are not met because the sample has fewer than 10 failures, which violates the condition for approximating a normal distribution.
c. No, the requirements are not met because the sample is not random, even though the number of successes and the number of failures are both at least 10, ensuring that the distribution is approximately normal.
d. Yes, the requirements are met because the sample size is more than 30, ensuring that the distribution is approximately normal.
e. Yes, the requirements are met because the number of successes and the number of failures of this random sample are both at least 10, ensuring that the distribution is approximately normal.
Mathematics
1 answer:
VLD [36.1K]3 years ago
3 0

b. <u>No, the requirements are not met because the sample has fewer than 10 failures, which violates the condition for approximating a normal distribution.</u>

Step-by-step explanation:

from the question,  the number of successes is equal to 30

and it is more than the number of failures

for us to conduct this test such as the z test the data we are using should be a random sample from the population that we are interested in. the population should be at least as big as the sample by 10 times. first of all We need to check if the mean of the sample is normally distributed.

if 26 are successes out of a sample of 30, then failures would be 4. therefore option b is correct.

You might be interested in
Plz help asp its 6th grade work 25 points and brainliest
Shtirlitz [24]

Answer:

what is the question and i can help u i am a math tutor for 6th grade

Step-by-step explanation:

5 0
3 years ago
Write an addition equation that can help you find 9 - 6. Explain your answer
vfiekz [6]
9 - 6 = 3
so 3 + 6 = 9  which is an addition equation that helps you find the answer. 

6 0
3 years ago
Read 2 more answers
So I really don't understand what​ I'm doing....I would be glad if you helped
SSSSS [86.1K]
We are supposed to assume FC and AD is straight line
let's find all the angles


you already see the right angle is 90 degrees, you got that right
striaght line is 180 degrees

90+46+EF=180
136+EF=180
minus 136 both sides
EF=44
now we got another straight line
you did get that A F=46 because it is oposite

notice: AB=BC because same angle designition
so now we use
180+46+2AB=360
2AB=134
divide 2
AB=67=BC
AC=134 degrees
CAE=134+46+44=224
ABD=180 since straight line



a. 90
b. 224
c.134
d. 180
8 0
2 years ago
What’s the measure of the missing angles?
Ymorist [56]

Answer:

Angle 1 equals 90 degrees. Angle 2 equals 38 degrees.

Step-by-step explanation:

Angle 1 is at the cross of two perpendicular lines, making it 90 degrees. Angle 2 can be found by making the two equal side lengths and the middle line into one triangle. This means that two of the angles are 52 degrees. This leaves 76 degrees to be split in the triangle. The middle line cuts the angle in half, making it 38 degrees

3 0
3 years ago
William put 0.83 liter of water into a bucket. Matt put 0.98 liter of water into another bucket. When they combined their water
Svetradugi [14.3K]
I believe that the answer is A.
6 0
3 years ago
Other questions:
  • Please do this I don’t know how to please
    7·2 answers
  • What is the value of x-3
    13·1 answer
  • 5/6×-4=-2 solve the equation
    12·1 answer
  • Casey read a report that said the probability that a randomly selected america is left handed is 14%. she was curious how many l
    6·2 answers
  • Help please I need the right answer
    8·1 answer
  • Alexis sells season tickets to soccer games. The season tickets cost $225.75. She makes a commission of 16% on each sale. Last m
    5·1 answer
  • a skateboard is on sale for $47.80. if this price represents a 50% discount from the original price, to the nearest cent?​
    15·1 answer
  • Help please !!! will give brainliest
    12·1 answer
  • Please help! Almost done! thx
    6·1 answer
  • The angles below are supplementary. What is the value of x? (5 points)
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!