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
-Dominant- [34]
3 years ago
12

An article claims that 12% of trees are infested by a bark beetle. A random sample of 1,000 trees were tested for traces of the

infestation and found that 127 trees were affected.
z = p - p/underroot pq/n
Using the formula and data provided, what is the value of the z-test statistic?
Mathematics
1 answer:
galben [10]3 years ago
6 0

Answer:

0.68

Step-by-step explanation:

The formula for z test is given above as:

z = p' - p/√(pq/n)

p' = sample proportion

= Number of infested samples(trees)/ Number of samples

p' = 127/1000 = 0.127

p = 12% = 0.12

q= 1 - 0.12 = 0.88

n = number of samples = 1000

z = 0.127 - 0.12/√(0.88 × 0.12/1000)

z = 0.007/√0.0001056

z = 0.007 /0.0102761861

z = 0.6811865737

Therefore, the z test statistic is approximately ≈ 0.68

You might be interested in
HELP. WILLGIVE BRAINLIEST<br><br> Add.<br><br> 17.4 + 17.7
VashaNatasha [74]

Answer: the answer is 35.1

Step-by-step explanation:

7 0
3 years ago
Pls answer these questions .​
Agata [3.3K]

Answer:

1. PQ

2. PR

3. OR/OP

4. OR/OP

5. RO

Step-by-step explanation:

3 0
2 years ago
Determine the margin of error for a 99​% confidence interval to estimate the population proportion with a sample proportion equa
Harman [31]

Answer:dudjdjdjdjdjdjdjdjdjdjdjdjdjdjdiidjdjdjdjd

Step-by-step explanation:

6 0
3 years ago
Can you pls help ...........​
Sergio [31]
Most likely: not red
least likely: blue
7 0
3 years ago
Read 2 more answers
Find the missing dimension of each triangle described Height: 7 in., area: 21 in2
leonid [27]
The basic dimensions of any triangle are its area, base, and height.
They're related by the area equation; the area is half of the base times the height, or:
A=\frac{1}{2} b h
We know the area and the height, so the missing dimension has to be the base. Let's set up an equation by substituting the values the problem gives into the area equation.
21=\frac{1}{2} \cdot b \cdot 7
Can you solve this equation for b?
6 0
3 years ago
Other questions:
  • I WILL GIVE FAN AND MEDAL
    8·1 answer
  • How do you determine an angle’s measurement in degrees?
    9·1 answer
  • Min makes a scale drawing of her rectangular garden using a scale of 1 to 25. Her garden measures 5 meters long by 3 meters wide
    11·1 answer
  • Susan Johnson earns a yearly salary of $83,280. a. How much would Susan be paid if she were
    7·1 answer
  • Please help me serious answers I really need it
    9·1 answer
  • Colby and his 3 friends buy lunch. The total is $30.60. If they share the cost equally, how much, in dollars, should each person
    8·2 answers
  • 2. A spy uses a telescope to track a rocket launched vertically from a launch pad 6 km away. The rocket travels upwards at a vel
    5·1 answer
  • Solve for x. Round to the nearest tenth
    13·1 answer
  • I need help (;´༎ຶٹ༎ຶ`)
    11·1 answer
  • Given that y = 11 cm and θ = 34°, work out x rounded to 1 DP.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!