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
Ronch [10]
2 years ago
12

Identify the kind of sample that is described. A researcher asked a simple random sample of home-schooled children, a simple ran

dom sample of children who attend private school, and a simple random sample of children who attend public school their opinion on the new town curfew.
Mathematics
1 answer:
Lelechka [254]2 years ago
3 0

Answer:

stratified sample

Step-by-step explanation:

The kind of sample that is being described is known as a stratified sample. This would be the type of sample because the researchers are dividing the entire student population that exists into various different categories or groups. The groups that have been created are home-schooled students, private school students, and public school students. All of the students are still part of the student population and therefore represent their groups.

You might be interested in
9. Which of the following is a mixed number?<br>a. 2.3<br>b.2/5<br>c.2 1/2<br>d.5/2​
Stells [14]

Answer:

C

Step-by-step explanation:

7 0
3 years ago
A newspaper published an article about a study in which researchers subjected laboratory gloves to stress. Among 215 vinyl​ glov
pickupchik [31]

Answer:

z=\frac{0.7-0.07}{\sqrt{0.385(1-0.385)(\frac{1}{215}+\frac{1}{215})}}=13.42  

p_v =P(Z>13.42)\approx 0  

So the p value is a very low value and using any significance level given \alpha=0.01 we se that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can conclude that vinyl gloves have a greater virus leak rate than latex gloves at 1% of significance.

Step-by-step explanation:

Data given and notation  

n_{V}=215 sample of vinyl gloves selected

n_{L}=215 sample of latex gloves selected

p_{V}=0.7 represent the proportion of vynil gloves with leaked viruses

p_{L}=0.07 represent the proportion of latex gloves with leaked viruses

z would represent the statistic (variable of interest)  

p_v represent the value for the test (variable of interest)

Concepts and formulas to use  

We need to conduct a hypothesis in order to check if the vinyl gloves have a greater virus leak rate than latex gloves , the system of hypothesis would be:  

Null hypothesis:p_{V} \leq p_{L}  

Alternative hypothesis:p_{V} > \mu_{L}  

We need to apply a z test to compare proportions, and the statistic is given by:  

z=\frac{p_{V}-p_{L}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{V}}+\frac{1}{n_{L}})}}   (1)

Where \hat p=\frac{X_{V}+X_{L}}{n_{V}+n_{L}}=\frac{0.7+0.07}{2}=0.385

Calculate the statistic

Replacing in formula (1) the values obtained we got this:  

z=\frac{0.7-0.07}{\sqrt{0.385(1-0.385)(\frac{1}{215}+\frac{1}{215})}}=13.42  

Statistical decision

Since is a one right tailed test the p value would be:  

p_v =P(Z>13.42)\approx 0  

So the p value is a very low value and using any significance level given \alpha=0.01 we se that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can conclude that vinyl gloves have a greater virus leak rate than latex gloves at 1% of significance.

3 0
3 years ago
Read 2 more answers
Slope-intercept form (-3,-4);=-5x+5
Harlamova29_29 [7]

Answer:

with the way you wrote it, it's unidentified

8 0
3 years ago
Solve the following expression when<br> m = 5 and d = 4<br> m2 + 2d + 8 + d
docker41 [41]
M2 + 2d + 8 + d

5(2) + 2(4) + 8 + 4

10 + 8 + 8 + 4

10 + 16 + 4

26 + 4

30
8 0
3 years ago
For what value of x is the figure a rectangle?
Anna [14]

Step-by-step explanation:

step 1. 4x + 27 + 3x = 90 (definition of a rectangle)

step 2. 7x = 63 (collect like terms. subtract 27 from both sides)

step 3. x = 9 (divide both sides by 7)

6 0
3 years ago
Other questions:
  • allison has 5 times as many baseball cards as football cards.in all,she has 120 baseball and football cards.how many baseball ca
    5·2 answers
  • The sum of the first n positive odd numbers is square.
    10·1 answer
  • Simplify m+{n-[p+q-(m-n+p-q)]}​
    13·1 answer
  • A convertible is traveling at 45 miles per hour, and its wheels have a diameter of 48 inches. How many complete revolutions do t
    12·1 answer
  • According to a human modeling​ project, the distribution of foot lengths of​ 16- to​ 17-year-old boys is approximately Normal wi
    7·1 answer
  • What is the equation of a line that passes through the point (1,8) and is perpendicular to the line whose equation is y=x/2 + 3
    10·1 answer
  • Robert decides to repaint his ceiling, which is 14 ft by 20 ft. He wants to make sure to not paint the circular light fixture wi
    11·1 answer
  • Noah has 10 meters of rip .How many pieces of rope length 1/2 meter can he cut from?
    14·2 answers
  • ___ Ba(OH)2 + ___ H3PO4 ----&gt; ___ BaHPO4 + ___ H2O<br><br> can someone please balance this?
    13·1 answer
  • Can someone explain to me how to do division? And also long division since I’m bad at explaining
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!